Thanks for bearing with me I,m not to adept to posting pics, but here is a second pic. It is hard to see, but the bottom bracket of donor bike( susp mtn bike) is bolted in the rear dropouts of the main bike. A little persuading was all it need to come together , then the crankarm nuts were tightened up. A little something I picked up from building a recumbent is the rear triangle needs to angle downward about 10-15 degrees so the chain don,t interfere in the "joined "area when in the small gears. Last but not least the pipe was held in place and cut,notched then welded ,although this could have been bolted. IMO I like the top tube to face the seat post it completes the d/f triangulation, like i said just my opinion. Cyclaholic, Fordfasterer and Roughrider504, keep up the great work I really like your guys projects.