Dennis, I don't have the CL model, but I have a 40MK III that I've used for RC. It's so beautiful, and runs so good that I've put it away to save it, as it is, apparently, one of the last that are English built. You might check out the "Just Engines" site. They are the distributor for Irvines, and although they're in England, they're geared up to ship to the US. They are also the folks to talk with, through email, about your questions. I got some good advice on how to convert the MK III to CL, if I ever want to. Glen