Ok, My local GC is blowing out their Markbass stuff. They have an F1 which I was all set to purchase and then along comes a R500! Both are 499 which is a great deal, being an Ampeg guy I'm leaning more toward the R500. My main concern is the lack of a level knob for the direct out on the F1. Anyone have any problems with the signal being too hot at the board? Does your master volume affect the direct out volume? Any advice would be appreciated.