the EVJ idea was just an idea, i don't have one, but was thinking of getting one to mod.
anyway, as it happens i've run down to maplins this afternoon and got a socket to add a power amp input to my (much modified) solid state combo. not the best solution, but good enough i think for the time being.
anyway, as you predicted, its considerably easier to hear whats going on with it now :) i haven't reinserted the clipping diodes, but i have changed my opinon about the drive 2 control - i do prefer it rather high. my R2 could do with a bit more saturation as i thought.
also agree regarding the high-mid control - the tone really comes alive with this set rather high. in fact i have mine flat out. i still find with the EQ set flat that it reduces the output level slightly though. obviously, with it set up to my tonal liking, it does boost the volume.
the noise of this preamp is really low - even with high gain dialled in to it you often wonder if its turned on.