I've embarked on a project to scratch build an Berryman Super Twister from a set of old MAN plans. If anyone ever wants to do this, I've found out that the R5/R6 templates on the plan are wrong. The spar notch on them really needed to be moved back a bit for proper fit. When I cut my plywood templates they were dead on to what the plan specifies and I had to fudge the ribs to make it work.

I'll get some pics when there's some decent sunlight. I beefed up the center section and engine mounts a lot since I plan to put a ST G.40 rat race engine in this one. Its probably going to screw me into the ground turning an 8x10 ;-> I'm hoping for something in the 130mph range.