Yeah, thanks. You pointed me to that before about the settings getting lost, but I wasn't fond of modifying the board (at the time) or doing a full rebuild of the linear power supply. I'm going to try the board mod so I can keep a switcher.
The not running all night thing is interesting, but it's been running now for days with the BACK open and no other games on. So I'm thinking it might be brought on by heat. I'm going to try applying heat around the board and maybe it will point to an area where the rams are messing up after they get hot or something. Or "lose" the backdoor I previously cut.