what are the trap door amendments you are talking bout?

found the service book online and the pages mentioned ....thanks

https://pinside.com/pinball/forum/topic/funhouse-t-nut-map#post-5505771

here is a very helpful thread with a t-nut map and where the different sizes are

please keep going with all of all of the awesome picture documentation......i am tearing mine down currently and doing a play field swap and your picture will make it much easier for me to get it back together

all your post and metal look so nice......like you hand polished each piece

link to service bulletins

http://howtopinball.com/files/pinball/paperwork/williams/service-bulletins/williams-service-bulletin-book-1991.pdf

Service Bulletin Book 1991
SB22
Problem: Trap Door Flap ( A-13962 ) bending or breaking.
Solution: install bracket 01-10223 with Phillips trusshead screw.
---------- ( part # 4106-01033-08 )
pg.17 has drawing of setup.
Basically an air gap in the front blue tempered steel plate and playfield.
----------------------------------------------------------------------
SB 28
Stress on the A-14155 Trap Door Hinge.
remount Trap Door Mechanism Assembly
forward .150"
Remove some material from chute assembly A-13966