I just finished installing a DL-30 rear carb. in mine. I am using a Jtec pitts style muffler and I've added the single bolt prop adapter from Valley View RC. If anyone else is using this combo be aware that you need to reduce the number of lite-ply spacers down to just 2 instead of the 3 stated in the instructions, in order to maintain the 170mm firewall to prop hub distance. The prop adapter adds about 4mm to prop hub length. All-in-all not a real big issue if you don't do it. Just a thought. ACF