I saw those..... Looks like a surface mount version of the LHE mod. Kinda similar to what I'm trying to design, but would like to see if I can squeeze a little better performance out of my design. If I get something working I'll sell the PCB's if people want them, but I'll also open source the design files if anybody wants to order their own from somewhere. I don't see the 2600 selling enough mods for me to want to keep my design to myself. Not to mention just about anyone here could probably reverse engineer it anyway lol.