to start with, prepping the playfield will make things go much faster (and smoother). this includes, running a drill bit through all of the holes to remove the excess clear coat as well as opening up the holes to accept screws and bolts
the following is a diagram of one side of my original NOS playfield with the hole positions and sizes called out by color. quantities are [per side]. the value in [brackets] at the end of each line represents the diameter of the drill bit that should be used to clear out and open up the holes.
chris hutchins mentioned a tip in another thread that he uses during his restoration process. he will initially run a brand new [sharp] slightly larger, brad tipped drill bit (in reverse) to cut through the clear (without chipping it away) and then switch over the correct drill bit size and run it through the hole completely
(2) flipper bat resting position roll pin locations [5/64" dia.]
(6) ball guide wireform locations [5/64" dia.]
(12) #4 wood screws to secure wooden side rails [1/8" dia.] NOTE: these are the holes that should be counter sunk from the underside so that the screws are flush with the bottom of the playfield
(51) #6 screw holes to secure hardware [5/64" dia.]
(23) #10 screw holes to secure hardware [5/32" dia.]
(4) #10 holes for playfield hanger brackets [5/32" dia.]
NOTE:this guide is merely that. I would recommend checking the actual diameter of the hardware associated with a hole before proceeding. the hole size for hardware that is threaded into the playfield should be smaller than the actual diameter of the threaded portion otherwise you will not be able to secure the hardware in place.
once all of the topside holes have been cleaned out, the playfield can be flipped over so that you can perform the following:
- install the ground braid for the general illumination common ground
- install the lamp sockets for general & controlled illumination
- install t-nuts for the machine screw hardware & posts
if I can take a good photo of the underside of a playfield, I will document the lamp socket and t-nut placement (by type and size)