EDIT SOLVED: See below ...

Still having massive issues with the ball auto launch on my GBLE. See both videos I shot in slow motion. Did some post processing from my android phone to slow it down by 10X

Ball hitting the one way gate - I've even slightly bent the sharp corner of that gate to eliminate as much of this as possible (and ball damage)

Ball hitting the wall behind the gate and dropping back into the shooter lane for "one more try"

EDIT, SOLVED - at least for me. I've tested with 75 consecutive launches and it's perfect!

I'll share what I did:

Slow motion study shows ball hanging up when getting into Staypuft dorner if too far to the LEFT

So ... I did the following and I would recommend them in that order

1) Removed (loosened is a better word) the auto-launch head piece and bent the left fork in to contact the ball at same time as the right. Before I fixed this the right side of the head was contacting just ahead of the left - this may have been 90% of the issue, but the difference was MAYBE 1MM in total - again, who knows.
2) Pulled top one way gate at Staypuft corner, slight bent out the leading corner that ball was hitting, then (on the backside behind the playfield backboard) I added a washer between the backboard and the left screw that holds the one way gate on. This effectively pushes that one way gate to turn more in the direction of the ball travel. That and the bent corner solved my issues.
3) Unscrewed left fork in ball launch ramp (long steel ramp thingy) and shimmed with 2MM shim (thus lifting it slightly to push the ball to the right)
4) Custom cut a plastic (template attached) to guarantee that the ball stays right - not sure yet how big of a role the custom plastic plays yet, thus this is recommended as the last step

Custom plastic notes:
- Must use .093 thickness as it fits perfectly in gap by ramp
- Must bevel leading edge or ball with hit it on way up (5MM bevel)
- Add a piece of target dead foam at end to "bend it out" to guide ball
- Attach to shooter lane (left metal guide) using a small piece of mylar
- If cut to proper height, the new piece will fit UNDER the left purple plastic (except where you purposefully bow it out with the dead foam)

Custom plastic is HERE at this google drive link: (don't use the image below, it's not to scale)

https://drive.google.com/file/d/0B9aPFmNkJCM7U3hqYnBqVVZFQlE/view?usp=sharing20160814_180408_(resized).jpg

Hope this helps others with the same issue - very frustrating

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Thought I'd share how I (finally) fixed my Slimer dragging his butt all over the place.

Below is a link to my first attempt - which is the same fix as the "add a set of washers" fix but I just raised it and tightened the set screw because you don't really have to have the washers. ... his butt still hit in 2 places.

https://pinside.com/pinball/forum/topic/official-stern-ghostbusters-speculation-thread?tu=mt45#post-3272845

My newest fix involves leaving the "washer raise it up" fix in place because you DO gain height.

Then I saw another Pinside say that he pulled up on the wire on top of the Slimer switch mech/arm and zip tied it. He is correct in that there seems to be about 1/4" or more of "play" so that you can grab that top wire above Slimer and if you gently pull it up, it raises Slimer that amount above the playfield. Now ... to get the wire to stay there.

I could not get the zip tie to stay tight, so I cut a 7/16 post rubber and slipped it around the wire on the top of the mech/switch/arm
Worked like a charm.

I think the Slimer registers side hits a little easier now, but other than that he does NOT rub/drag at all!

First video is with ONLY the "washer raise it up" fix in place - again he still drags
Second video is with the 7/16th rubber in place (see pic for close up of it installed)

Cheap and fast fix!

Dragging Butt

FIXED!!!!

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Update to my GBLE Airball fix plastic.

https://pinside.com/pinball/forum/topic/official-stern-ghostbusters-speculation-thread/page/330#post-3292934

Added some green slime to plastic using white decal paper

Slime template is HERE:

https://drive.google.com/folderview?id=0B9aPFmNkJCM7U0xIQzVHeE1Lems&usp=sharing

1) Print at full size, with printer setting to photo paper
2) Use exacto knife to trim the slime parts (wow! hard)
3) Trim back end (straight edge) using metal ruler
4) Clean up the "tips" of the slime (you wont be able to perfectly cut them round)
5) Test on plastic
6) Remove backing starting on left orbit edge and work toward middle of plastic

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You can find my template at the link below. BTW, love the modification that TaylorVA did, on my game it does not rub, but I'm not sure you could slide a human hair between it and the ball as it goes up the ramp. TaylorVA's semi-circle cutout completely eliminates that as a potential issue

https://pinside.com/pinball/forum/topic/official-stern-ghostbusters-speculation-thread/page/330#post-3292934

Look just a little way down my post for link to the template