I bought a Grand Lizard as my first pin about two months ago, and as a family we have already racked up about 2,000 games. I will eventually finish reading through all of the posts here, but I do wonder about any super challenges you all have tried to achieve since the game isn't particularly deep. Someone suggested attempting to catch all three balls on one magnet during multiball.

I've hit 7M on three balls and 9.4M with extra balls. From other comments, it sounds like this is achievable.
I have noticed on my machine that occasionally you can shoot from the left flipper through the spinner straight into the upper left loop. Anyone tried continuing this with shots down the right orbit, up the left ramp, straight down through the spinner and into the lock shot?!
I've shot a ball back to the plunger once or twice....

So I toyed with the difficulty settings over the first few weeks, but for now it sits at factory for the timers at least. I would certainly consider changing the three bank to harder so that all completions are timed and set the mystery and speed 50 shots to as short as possible so that you must make the shot on the first try.
My pitch is already at 6.5 but occasionally I set 1/2 inch boards under the back legs. I think this is plenty for this game, but a friend of mine uses 2x4 blocks to change up his games.
I did remove the center post for a short time, but I decided that the post would probably give me at least one or two clutch saves if I intend to roll the score.
I play all or nothing on extra balls, usually nothing.
I have my replays set to 2M, 3M, and 4M, audit only.
I imagine that wax would reveal some wicked spin moves!

I also have a 6-year-old who likes playing, so I try not to leave it too punishing....

I would say a huge game changer is moving the plastic posts above the outlanes. I have my right post at the lowest position (easiest position) and the band there returns soooo many balls to the flippers.

I bought my GL with a playfield protector so I don't know any differently. There is a decal over the upper playfield and then the protector throughout. I have not tried to wax it yet, but it plays just fine!

Anyone tried scoring less than 3,300 in a game?
Anyone tried collecting both A & B mystery awards on the same shot? This seems impossible even with multiball, but you would need to hit something like right inlane, A ramp bottom gate, left inlane, and B ramp all the way to the top, within about 5 seconds.
Anyone tried scoring the upper playfield Special with less than 200,000 points? 12 x 1,000 + 6 x 25,000 = 162,000....

I sent pictures of my lizard head to someone on the Buffalo Pinball Facebook page. Post there or find and message Christopher Camacho if interested.

I thought I saw a hint about new code for this machine but I have no other details. Anyone have more info on this?