Well, I'm not sure where to measure the B+ from, so I don't know if it's jumping around or even what it's reading. I assume they are set when they test the chassis, but that's assuming they test them at all.
The only thing I have noticed is that the image is slightly "wavy." I tried an MK2 board in the Neo cab and it's NOT wavy, so I chalked it up to something with the Neo board.
Either way, I am happier with this in there than the original 25" Sharp that was in there before. That one took nearly a minute to fully warm up and display at full brightness. The tube needs rejuvenated. Plus, I don't keep my machines on for hours at end. I turn them on, play them, and turn them off again, so I 'm not too worried about these replacement chassis' burning up.
Thanks.