How about 631s?
Thanks for posting that lesson. Any comments on fluting the 631s (these are the heavy 063 arches on the back of the tipup canopy frame)? Mine were flat as delivered, but the instructions say to increase the flange angle from 88 to 92 degrees (presumably to be parallel to the plexiglas canopy). Once one adds that bend to the flanges, the flatness goes south fast. I eventually was able to make enough flutes to get it somewhat flat, but the edges look like lasagna! Any insights would be appreciated.
RV-9B (Big tires) Tipup @AJZ or CYSQ