After playing with my empeg a bit longer, I've noticed that the main problem with the rotary controller isn't so much its size (although it would be nice to increase it), but more importantly the rate at which it changes the volume. I find myself having to turn it quite a few times to adjust the volume from low to adequate.

Wish list item: either a faster response rate on the volume ramp, or the ability to adjust it (as one does with mouse movement rates on a computer).

Oscar