Sourcing, research, and 3D printed radius gauges
Got referrals to places in Tucson that have long sheet metal brakes, and learned of a better online source for 6061-T6 at airparts.com than Wicks or Aircraft Spruce.
Placed a small tools and materials order with airparts.com including .04 sheet 6061 which they ship rolled (and which other online sources do not).
Exhaustively researched options for precisely bending radiused edges on 6061 .016-.032 and landed on making curved shims with non-tempered aluminum as the most cost effective and least time consuming choice. Going to do a proof of concept on a 24" brake using 3003 aluminum. I'm anticipating that 2 layers of .032" (bent in succession around each other) to max angle of brake will create a nice radius when combined in two layers under the brake fingers. If that works, I'll buy an inexpensive 48" to use that with as I'm not very motivated to build one.
Ordered manuals from flycorvair.net and researched local Corvair clubs and parts sources.
Watched videos on scratch building Zenith 750 stabilizer.
3d printed some mm radius gauges to verify the wooden shaping forms' round overs are adequate. I found that most of the ones I've made with a 1/8" round over router bit are not enough based on what's specified in the plans, so I ordered a 5/32" round over bit.