Scott Riese converted my old K & B 40 RC engine with an Irvine carb to control line. Scott removed the RC carb and installed a venturi and needle valve assembly. Scott also machined an aluminum tongue muffler for the engine. I am looking forward to getting this engine into the air next summer. I am very pleased with the quality of work and service provided by Scott. The price was very reasonable. Scott is nice to deal with and I would recommend his services to anybody.