For sale is a Keeley modded Turbo Rat. The pedal was made in the USA by ProCo. I bought the Turbo Rat used, and had it modded by Keeley. I asked that they put a chip socket in for ease of changing the chip, if needed. It has the LM308, of course, as part of the modification. It has three modes, the Vintage (Turbo) Rat, Mighty Mouse boost, and a Fat (Turbo) Rat mode. It was explained to me that this would make the Turbo Rat approach a more vintage Rat sound in the Fat Rat mode. It is much more versatile than the standard stock Turbo Rat, and sounds excellent!If there are any questions, please ask.For more information, read here: Keeley RatOn Apr-20-12 at 21:00:05 PDT, seller added the following information:FWIW: I will include the one page instructions, which are available here on the Keeley Electronics website.