Well, I think I've made up my mind to use a MVVS with a Pitts style muffler and a cowl of some sort. All that's left is to find an engine. I'm hoping for a used one to save on cost, and may have found on, but I will go new if I have to. I'm hoping to get my kit today so I can start building it and hopeful have it ready to accept an engine within 2 weeks. If it builds like my Sig SE than I should be able to accomplish that goal.