So with a newly quired Bally Special Force I noticed that it had some issues with registering balls that drained, sometimes spitting out two balls in plunger lane etc. On closer inspection, I discovered that

1) This machine (and others like it guess) has some strange metal actuator switches which Ive nver seen before.
2) The first and third metal switch was reeeeal sticky, see video here:

I got curious as to why Bally started (and then stopped apparently) using these type of metal switches, and also if anyone know the exact part number for them (if I need to replace them), and if there is any trick to deassembling these or if its just to remove the screws holding the whole trough assembly and then lift it out?

Took it apart, and i suspect issue with actual switches. Anyone know what parts these are?

Video of the trough in different slopes here:

The metal actuators seem fine alone, but connected to the assembly and together with micro switches all becomes sluggy.

20190809_194029 (resized).jpg

I never fully got to solve this as a I solved the game, but the last I saw when selling it with the "cover" og the trough open, was that the ball stopped on the middle top between the outhole and the plunger hole thing.

Since there are some other solutions here and Ill never pursue that exact game, Ill mark this as solved.