Check the listing for details. Modify your MXR Dyna Comp (Vintage Ross specs) Compressor Mod Service Only. Condition: Used. Listed at 59.95 USD. You supply your MXR Dyna Comp Compressor. No pedal is provided! Notes: I modify the circuit to vintage Ross compressor specs. I also upgrade the knobs to your choice of style / color. Additionally, I add a bright LED in your choice of color & brightness. I know what I am doing and my work is clean and correct. I am meticulous in my work. I pay attention to the details - including cleaning / lubricating all jacks and pots, replacing any worn or missing battery straps, grommets and screws and fully testing every function prior to shipment. Still not convinced? I guarantee my work until the end of time! That's right - if you should ever encounter an issue with the craftsmanship on my modifications or repairs, I will repair or replace free of charge! I don't strive to be the cheapest. I strive to be the best! My reputation speaks for itself. We've modified and repaired gear for professional musicians - including members of Aerosmith, Foo Fighters, Megadeth, Anthrax, John Mayer, Bruno Mars, Counting Crows, Lucinda Williams, Tracii Guns, Joe Walsh, Wilco and Smashing Pumpkins. Buy with confidence! This is a serious upgrade to the stock pedal. My work is clean and correct. Free domestic return U.S. shipping via insured USPS Ground Advantage using professional, secure packaging. More overseas. Local drop off / pickup in Minneapolis, MN can be arranged. If you have any questions, please feel free to contact us. Click here to see our other auctions. Check Out Our 'About Me' Page For More Info On Our Company!