My amp (silverface 40W Pro Reverb, no mid control, with push/pull master volume) is going in to have its lack of clean headroom looked at. I have faith in the engineer's ability to find faults as he already made improvements to the amp by replacing HT capacitors to bring the power up from 20W to 30W, at which point we agreed I would try it for a while as it might have been fine for my needs, but in fact I do still want more clean power/headroom. So it's going back in tomorrow and he will do some more testing. However in addition, and as I get all my overdrive from a pedal and therefore have no need for gain from the amp, is there any benefit in having the master volume removed altogether? As it is, I usually have the 'master volume' quite high and as little 'volume' as possible to maximise the clean sound, but it's still breaking up before I want it to, especially on chords. I don't care about anything other than squeezing every bit of clean headroom out of the amp but don't want to have mods done just for the sake of it. Thanks in advance for any shared experience on this.