I've noticed over the years some of my PS2 engines won't keep my sound volumes in memory, which is annoying. This is one of my favorite features on MTH engines, the ability to "mix" audio volumes. I would imagine others may have experienced this same problem, and also many probably really don't care, LOL! I know one of the engines has the 2, wrapped blue rechargeable batteries (is that the 3V system?) in it. Is it due to the type of rechargeable in the engine?
Thanks,
Rich