Chiming in here for you Joe, if you dont mind.
Whether you ordered from LSOG, myself, or Joe, we have all learned there are variations by a few mm in the assembly of the game.
The Slimer Mech, especially, is off more often. You can see the oval hole in the playfield on premium that shares, Stern knows that variations in Assembly will occur.
For this reason, any Airball protector I have made, or shared, has about a 95% success rate.
There simply are games, that with a quick install will not be 100%.
I Have offered additional help with how to adjust....washers, standoffs, hole lengthening,, and Joe has redone his model.
We are all listening and hear the issues that come up, but impossible to get 100%.....after all it is a Stern Issue first, not a flat piece of plastic.
If you have any problems....reach out...we may make an error, a plastic could break, shit happens.
People here too, all of us, and we arent running away.
In this regard, we all wish for 100%....I have racked my brain, and spent weeks hand cutting variations, slots to let it ride higher on the ramps, curves, thicker, pop bracket mounted. This is where we are.
Got a better one...share, but remember its got to solve EVERYONE.....thats the tough part.
We all do try. Sometimes, we will fail....it happens, but please remember, these do work for the great Majority, and even LSOG, has retooled again, to increase a few points, the success rate!