On Fri, 18 Jan 2013 13:52:30 -0600, Darrall Dougherty wrote: > Can you post pictures and info on what you did with your trimpots? Hi Darall, sure thing! By the way, would you mind sending postings to rather than to me personally? Thanks. I have a couple of old pictures of some initial work on my OD1 trimpot mod. (Attached.) The only difference is that I tightly braided the three wires, and mounted the pot so that it protrudes from the left side of the unit. In a rack, you can reach the pot from the back, or if you have space around the unit by reaching in from the front. You can see in the pic how I removed OD1 and replaced it with hookup wires going to an external pot. Also, a copper jumper replaces a resistor. IIRC, I did that so that the gain can be turned down lower. The original pot is 20K, if I recall. I think a 100K replacement is more than enough for better gain, but I have a 500K pot. I don't play with this pot much. It calibrates the unit if you change guitars or play with your pickup height. You can get the same amount of gain whether you have an axe with "vintage" passive pickups, high output passives, or actives. No editing of presets: just turn a knob! Next time I have the unit open, I will post up-to-date pictures of this.