Thanks for the pictures Ken.
No problem, but my name isn't Ken.
the one thing I didn't check was the alignment of the 1/4"X20 threaded holes with the holes in the phone. The (4) 5/16"X24 bolts in the phone lined up with the keyway holes in the plate, so I figured everything was cool.
Yeah, the brass security studs have an unthreaded portion which is thicker than the threaded portion, and the unthreaded part is what rests on the bottom of the keyhole slots. If using hardware store bolts that are fully threaded, the phone is going to rest a little lower while hanging from them. The holes may still line up, as there is some margin for error built in. Even if they don't, you can lift up on the phone a bit to get the alignment you need while screwing in the 1/4-20 screws/bolts. The 5/16-24 hardware store bolts will keep the phone from falling on the floor while installing the 1/4-20 screws/bolts, and that's the important part.
BTW, I did try to buy the security bolts at payphone.com, but shipping came to > $12.00 for a $3.00 part. That's not going to happen unless all else fails (just out of principal).
I don't blame you; it is patently absurd. They could be shipped USPS in a padded envelope for less than $2 (I know, because someone shipped me some that way).
I really don't need the 1/4"X20 bolts any way since theft is really not an issue with my installation.
When using the real brass security studs, the fit when just hanging from the keyhole slots is not tight; i.e., you can move the phone front-to-back about 1/8", and side-to-side some too. You want the 1/4-20 bolts just to tighten it down. They are dirt cheap at any hardware store anyway. I recommend truss head, or anything with a fairly low profile head. Hex head bolts can get in the way of mounting the chassis and the vault alarm switch.
I've masked off both halves of the phone and will be painting this weekend.
Why mask anything off? You can just remove everything that you don't want paint to get on. Everything is easily removed from these phones; you can remove everything right down to the bare upper and lower housings in a matter of about 10 or 15 minutes using a screwdriver, a set of SAE sockets/wrenches, and a set of SAE allen wrenches.