Good idea Page. Just take the knobs off.
Mine doesn't look like this picture, mine actually has db markings 20, 30, 40 etc. It stays around 25 (or 11 o'clock) most of the time and I thought about using tape to hold them in place, didn't think about removing them. Along with that output knob (-inf to +6db) and possibly the gain on my MR1/R4 I could definitely live with that. And I expect I could adjust the small shaft with my fingers in a pinch.