interesting chat... here is what I learned over the years that people might find interesting
Flipper gap - is Trudeau's signature flipper gap measured at the flipper posts - 7" being the standard and Trudeau's being 7 1/8". What makes it worse is the first 6-9 months Stern sent the games out with the flippers tilted more down than the in-lane feeds which effectively increased the gap:
https://pinside.com/pinball/forum/topic/ghostbusters-club-we-got-one/page/136#post-5178245
and this one with messages when I chatted to Trudeau before we were aware of what happened with him:
https://pinside.com/pinball/forum/topic/ghostbusters-club-we-got-one/page/174#post-5875005
Airballs - are a result of the target height and target angle and the rivet on the target - and also the pan angle which we can not doing anything about - see this post:
https://pinside.com/pinball/forum/topic/ghostbusters-club-we-got-one/page/83#post-4077504
Flipper extenders - I tried this and very hard to 3d print as to insert just an 1/8" extension, it has to be printed so it tappers to nothing otherwise you get a gap on the front and back and affects play - has to be professionally printed and even then they don't allow to taper to nothing so I did custom flipper bats.
Custom Flippers - The Germany companies approach is nice and look more professional than my design but my design allowed for quick flipper bat swap overs:
https://pinside.com/pinball/forum/topic/ghostbusters-club-we-got-one/page/111#post-4688960
Outlane Drains - Trudeau also confirmed that the small rails were installed too low on the first 6-9 months of games resulting in excessive skip over the lanes. But if you go into you switch audits you can see that the ball drains alot out of the out-lanes and it isn't a kid and or visitor friendly game so I created a foot operated proton gun mod. Currently worked on an integrated upgrade add-on so all going well the mod will be a earned feature.