I'd call MESA direct but since they're closed Friday's I'll ask here. My newer model Strategy Eight:88 differs from the user manual in that the trim pot adjustment screw appears to have been replaced by a black knob located on top of the chassis. Can someone confirm this? Seems like it would be easy to accidently hit thus changing the setting. There are a couple of features on my model that are not shown/addressed in the user's manual supplied with the amp or online hence my inquiry. Thanks.