thought I had one up guys using a jig, I found a small sheet metal brake. after practicing with some sheet metal, I decided to try it. measured to the center of the flat & then 5/8" out from center. had found some dimensions that showed ID to be 1.250". bent flat but but TG rivet holes too close to bend. first bend was great, second one i was not able to get the 90 degree angle because of clearance issue of brake. does anyone have any accurate dimensions for bending w/o a jig?