Haven't seen any build reports on this so I thought I would put one up. It sounds quite good! I really like the flat mids mode, my only quibble is that I wish it had a touch more gain in flat mids mode. The Silicon and Mosfet clipping sound pretty similar to me, only slightly different but I think I prefer Mosfet. Overall it's a very nice sound. I think it will end up on my board if I can figure out which other pedal to bump off. :-D I had a little trouble with electrolytics that were too tall for my 1590b, other than that it went right in.