What tubing will you use for the frame and roll bar? DOM? What diameter and wall thickness? I want to build a tube space frame from scratch, and am planning on using 1 1/2" dia with .065" wall (16 gauge), which should be plenty strong enough, probably over-kill. The big diameter really helps the strength/weight. I might go with chro moly tubing and oxy-acetylene braze it, used that in other projects and like it!
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