It was the tubes!!! I’ve replaced them with a 12AY7 on the left as the driving tube and a 5751 gold on the right.

Anyone considering this mod that has stumbled on to this thread go for it.

Its a massive improvement and I dont understand why EHX doesnt sell them with this tube configuration as standard. The bigest difference it makes is it being balanced accross the eq; if you set all the pots to 12 o’clock it fits, it doesnt sound like you’ve got the treble up around 9 o’clock. The 5751 also makes it richer accross the whole of the tone, like it has more substance and depth throughout. I cant emphasise how much nicer this it makes playing through this pedal, not that it wasnt great as it was.

It does increase the gain available significantly, but it just means havng the tone knob dialed back a little more, to work it like a pre-amp it’s just the difference between fiddling about around 9 and 10 o’clock and fiddling about around 7 and 8 o’clock instead…. and the ammount of extra dirt available opens up a new spectrum of pessibilities.

Nothing else about the way the pedal behaves in relation to the controls seems to have changed either, only the gain and the treble pots, while still making it all sound more awesome