Just picked up one and hope to ligt it up this weekend on the test stand. I picked up a few props too to compare figures. I'll post the numbers as soon as possible. I plan on using the following props: 11x6, 11x7, 12x5 and 12x6. I already removed the baffle from the muffler. I compared the muffler to the one to my .61fx and the TT looks to be a bit larger (move volume). My .61 fx is fairly new so I might run them both and do a "TT vs OS .61 shoot out"