Quoted from evh347:

I’ll play with mine tomorrow. I do get rejects too. Very inconsistent rejects that I haven’t been able to reliably blame my shooting on or the machine to this point.
Where exactly is that software setting to toggle the T-rex movement? I’ve not found it yet and I’m missing it in the manual.

Quoted from EaglePin:

To get into the vertical test select "Diag", then "Game", then "Vert" for the T-Rex Vertical test.

When I first got mine it was also (like yours) too high above the ramp and rejecting probably 3-out-of-4 or 4-out-of-5 shots. After the information about the physical bracket adjustment was released I spent a bunch of time monkeying with it one night and I think I figured out the gist of it. When you go into the T-Rex Vertical Test, there are three T-Rex head heights you can toggle to by using the +/- buttons. You'll need to pull out the white interlock switch at the coin door hinge in order for power to go to the system while you're using the vertical test. First, hit the - button to lower the head. Then hit the Start button (same one you push to start a game) to open the mouth to see how high the mouth is off the ramp when it lowers & opens during the game. Check to see how high the bottom of the mouth is off the ramp in this position (T-Rex head low in the vertical test and mouth open). Pushing the start button again closes the mouth. It seems to me that if the bottom of the mouth is more than about 1/4 inch above the ramp you might want to lower it a bit.
To adjust the height, return the T-Rex head to the middle level of the Vertical Test by hitting the + button while it's in the lowest position. Now you'll need to pull the playfield out to the service position so you can loosen the 4 nuts behind the backboard holding the bracket in place (the nut on the bottom right as you're facing the machine is a blind shot to try to find it with the hex driver but it was very do-able once you found it - it's in a symmetrical position to the other nuts). I played it safe by turning the power off before I went to loosen the nuts. Don't loosen them very much, just enough to release the grip on the bracket. If I recall correctly, when I got all four only just loose enough to release the grip on the bracket the head lowered down a bit on its own. If it doesn't lower by its own weight, then you'll want to gently push the head down until the bracket won't let it lower any further. It's not a lot of movement down, but it's enough.
From here when I was monkeying with it I re-tightened the nuts on the bracket, pushed the playfield back in, powered the machine up, lowered the T-Rex head to the low position in the vertical test, and hit the start button to open the mouth. The mouth now completely rested on the ramp when it was open. When I hit start again to close the mouth it wouldn't close (I'm guessing because it hadn't opened all the way). I had to nudge the mouth with my finger to close it. So that meant I'd hit the bottom range of adjustment, and I was a bit too low. So I pulled the playfield back out, moved the T-Rex head back to the middle position of the vertical adjustment test and powered the machine down again. Then I re-loosened the nuts and only just a very, very, very little bit lifted and held the T-Rex head in place with one hand while I re-tightened the two most accessible nuts to hold it in place, and then tightened the other two. It was really only just the slightest lift up to get enough of an adjustment - just enough so the horseshoe openings of the bracket for the screws weren't in contact with the screws any more. A very slight adjustment in the bracket with the head height in the middle position of the vertical test translated to more of an adjustment in the lowered head & open mouth position than I expected it would.
After that, I retested by pushing the playfield back in, lowering the head in the vertical test, and hitting start. The bottom of the mouth was now probably only about 1/4 inch above the ramp & I figured it was close enough to try it out. Since then it's been catching probably 4-out-of-5 or 5-out-of-6 balls that it legitimately should. There are still some that it misses that I think it should catch and my distributor said he got a better understanding now of some of the software adjustments that can be made but I haven't had time in over a week to call him and go over it. I think once I get those figured out I'll be good to go. This is just my experience from memory, but I hope it helps a bit.
One thing to note. Watch the T-Rex head when you raise and lower the playfield. Make sure it's pretty centered looking down the ramp before you power up.
A couple times I didn't realize mine had swung to my right (its left) and was up against the left ramp where it goes through the backboard. When I powered up it started grinding, so I just immediately powered down. It was okay because I only had to use my hand to easily move it back to center before powering up again, but hearing that sound took a couple years off my life.
I think it's an amazing mech and it just needs a bit of tweaking to dial it in. The physical bracket adjustment just wasn't very intuitive. I figured the right position to make the adjustment would be in the low position of the vertical test, but it was impossible to make an adjustment in that position. I just kind of stumbled onto the fact that you need to make the bracket adjustment while it's in the middle position by accident (I didn't try the high position at all). Hope this helps. I'm sure the software side of the adjustments will really help too, but I don't know anything about them yet.

The link to your video didn't work for me, but the mouth of mine also skews a bit to the left to fit into the ramp when it opens. After making the height adjustment it's catching balls a lot more reliably, but I'm definitely wondering if this left skew could be resolved by a software adjustment to dial it in even better. I'm guessing there are one or two other software adjustments that might help, but I don't want to mess with them without first hearing from someone who knows what each one does.

Quoted from timlah79:

Funny you said that it seemed to grab the ball better when you first started playing. I also only noticed the lack of it after a few games. I haven't touched the mouth opto just verified it "works." Unsure what setting changes that opto if there is one in 0.90.0. In quotes because yes that and the ramp optos works but the mouth/magnet doesn't not unless the ball makes it into the furthest back point of the mouth--which means you have to at least have the T-Rex's position perfect on the ramp, which it never is for my machine. Changes time to time, sometimes centered, sometimes left side, sometimes right side of the ramp. See mine and multiple other folks posts about T-rex issues in this topic.
Might be time to start a separate topic about LE/Prem T-Rex specific issues. This has been the most frustrating issue about the game. There are adjustments in the menu that many have tweaked to resolve. I've tried them all to the point where one setting makes it better for a play, then the next it's as if what I did made it worse. I'm personally at the point where I'm done with both hardware and software tweaks, providing video's etc. I've convinced Stern to send me a whole new assembly. If you want to mess with it software-wise, yes there are ways to "improve" it from some fine folks advice. Unfortunately none have fully resolved the issue for my machine.

Quoted from PBatt:

Hey there. #476 here in Austin Texas. My first LE (and kinda my wifes pin . . ).
Got a question for you- Anyone having issues with the T Rex not grabbing the ball? Mine rarley does. Tech support contacted, but I though I'd ask here.
Thanks!

Quoted from MrMikeman:

You've had some bad luck I guess. However, to keep your analogy to the car purchase, when you buy a car the manufacturer doesn't send it directly to you. They send it to the dealership who will then inspect and prepare it, then you get it. Your distributor should have offered the same service. Take it out of the box to inspect and prepare, then sell it to you. If however you chose to have the unboxing experience well then that's the risk you take. Things do happen in shipping. My distributor(from Montreal) offered to check it all out for me but I declined, knowing full well what I could be getting myself into. Even though this was my first NIB, I've owned many pins and feel comfortable fixing issues. I also had nuts and bolts in the box and in the cab, but the game functioned pretty much as it should have. I still get the odd nut or washer sliding down the playfield but it's getting less frequent.

Quoted from MrMikeman:

Did you deal with the "local Kingston distributor"? I don't think he's an authorized Stern dealer. I believe the only 2 authorized distros in Canada are Nitro Pinball and Player One. I dealt with Player One and the service was awesome. My LE had the wrong legs (black) and the distributor got the green ones from Stern and then shipped them overnight to me. Obviously I had to install them myself.
In any case whoever came to install the game in your house was responsible to ensure it was functioning properly. Pressure them.

Quoted from MrMikeman:

Yeah unfortunately even though they are targeting the home users more than the commercial operators now, their business model/philosophy hasn't caught up. They sell these things with the assumption the end user can maintain and fix it themselves. Warranty covers parts only (I think).
Also, it's a commercial money making device. If it was on location it would still make money whether the trex works or not. The operator would just disable it in the settings and the game would play normal. Same with a ramp opto that sometimes misses the ball.. In a home environment it sucks and isn't really acceptable. In a dark dingy bar it doesn't matter...

Quoted from Munsters:

Download JURASSIC PARK TREX ALIGNMENT PROCEDURE ( PDF)[quoted image]