I had been running this fauxcade setup for a few weeks, before deciding to unsuccessfully purchase an arcade cabinet and hastily disassembling it in an attempt to keep my wife from leaving me. But,
I got a new toy yesterday. It is a PVM-1944Q from 1989. Only the RGB input works correctly and also it loses sync if you leave it on for too long.
Spent a couple hours inside trying to improve the picture with the focus knob and convergence rings while thinking about death by electrocution, to mostly little avail.
I had found the sellers old reddit post about finding it abandoned outside filthy, from a number of months ago, after seeing his listing on facebook market. He sold it to me for forty smackers. The guy and his roommate had a bunch of crts in there, a 20L5, JVC pro and presentation monitors, consumer Sony stuff, etc.
His roommate got hype when I told him I used to work for ADV Films and started listing his release collection. Cool dudes, they even carried the monitor to my car for me.
Converted Big Mitsu back to HORI and daisy-chained them together. Need to look into getting another vga->bnc cable to run different stuff simultaneously.