Hi. I got that address and i`m going to see what they`ve got . Does any one else have suggestions or ideas? I`ll break in the engine useing Super Tigres stock exhaust system on bench,.But I want to weigh out all my options, before I finish setting up my mounting platform. NOT sure if I mentioned ,it`s going to be F4u-5(longer from wing forward than F4U-4 and earlier varients) Hopeing to here more from folks. THANKS again DAVE B.