Any tips on reducing the fizz on an old Marshall drivemaster? I love the pedal but have recently discovered that the shrill presence it produces can only be removed by having an EQ pedal after it. It's one of my favourite drives and I don't want to bin it, but when switching from/to the more fendery OD3 its a real bummer to have to turn on the EQ every time I hit the DM. Anyone know of any "pull this resistor out" type mods????