Just thought of it. Flat on the ground, put the center in the middle of the rim, on 2x4's or? Then put the cams and wedges on the rail. Get them in equal positions on the rail now start getting the carriage bolts to line up with your fingers between the 50 pound wheel center and the dirt.... see what I mean about needing beer for this job? Hey the rims are worth 3 or 4 times more than 6 loops, I'll bet someone will want to swap you. Let them figure it out!