to the first guy that posted, the 77 Inch solution was designed around the D&B 3.7 twin. anything more or hacking up the cowl is not necessary. I have a 90 inch solution that miles built personaly for me a few years ago. I have a D&B 5.1 and at 27 lbs the performance is awsome. Kermit weeks is also a friend of mine and I can assure you the full size solution still does exhist and will be rebuilt in the future. A beam fell on it right behind the canopy and basically cut it in two. The solution is one of the best and forgiving models I have had. It goes where you aim it, does not have any bad habbits, and lands like a trainer. Anyone interested he has a framed up 90 incher for sale. If your interested I can contact miles