> Also, when updating individual ROMS and doing a refresh, is there a way to stop the ui from doing a FULL refresh and only update the new stuff?
Right click & choose audit to only check that specific game should work. If I were you I'd read through the help file, A LOT has changed since your last update. Also, if you go under >Options >Interface you can turn it off from doing a full check every start(in case you didn't know. Another point would be to not use MAMEUI to do your audits. Get Romans' CLRMAMEPRO and learn to use it. Much, much easier for finding & filling missing things.
Can't help you with Berzerk. No dip settings I see change Ottos appearance time. I'm almost sure that someone has compared the time he appears on a PCB with MAMEs timing & made sure it is accurate. I'm not certain but I'm sure someone out there can verify it.
Pessimist: Oh, this can't get any worse!
Optimist: Yes, it can!