Arcade monitor and Coin Reject Button questions

I am in the middle of cleaning up and making some changes to my cab; the first thing I've done is to replace the caps on the monitor's board. I see a big improvement in picture quality, but the problem that I had hoped would be fixed by the cap kit install is still there. A small horizontal section at the very top of the monitor is slanted to the right. I've tried all of the adjustment knobs, with no benefit. Does anyone have any other things I might look for?

Also, this cab was originally a Dig Dug cab, that seems to have been converted to MVS in 1994 (so I didn't mangle an original Dig Dug cab), and the only things I really need to replace (other than the monitor caps and the power cord, both of which I've done) are the two coin reject buttons; over the course of the cab's life, they have been drilled into, scratched up, etc. Happs carries replacement reject buttons; does anyone know if they are pretty universal, or do I need to find buttons that are specific to this coin mech?

TIA for any help...

Just measure the reject buttons and compare the looks and measurement to the ones on the happ site. Really, all you're doing is pressing on a level behind it.

QWTFZOMG. I hate not being able to edit.
That should read "lever behind it..."