Hi. I hang in Shock Brother mostly. Built a couple of amps, building another, but I got the bug to mod and build pedals. Got it cheap, about $30. Was noisy -- buzzy and hissy -- and just made everything else noisier. So I started with a Framel mod, all caps, resistors and diodes. Still a nice upgrade nonetheless and that did away with the buzz and some of the hiss. I started researching other mods and kits. Found lots of information and even considered Allums Opto Plus mod, involving some op amp swaps as part of the mod. But I figured I already had the equivalent of the Opto mod with the Fromel. Instead, I got some of Monte's SIP to DIP conversion boards and risers as well as raised sockets. These will give me some room to play. But I had read someone else swapping out the SIP JRC4558LD op amps with Burr Brown OPA2134PA and had great results. I had a couple on hand and now they reside in the CS-3. This will never be a studio pedal but the hiss is now diminished tremendously and this pedal sounds very transparent. For live play this will be wonderful, especially with slide. I'm not a noob with electronics. I've done a lot of searches here and learned a lot as I lurked. I just wanted to share what I had accomplished. I'll do pics later.