My way for laying out bends, getting the info into bend tech, and getting bend instructions from bend tech.
Also these 1x2 strips are easily adjustable and shows me quickly if I can place all the bends in the same plane or not.
The material added to start and end, is how much material is needed in order to make the miter cuts where the tubing meets the frame at the correct angles.
If the bends are in a different plane, typically I will screw an additional piece perpendicular to determine the rotational angle separately from the bend angle.
Yes I know I can lay it out by hand and bend it, but this gives me record of what I did, and I know if I follow the instructions from cut to layout and bending, I will have the desired part, or I executed something wrong.
Note that I added 1/8” to center dimension vs. wood mockup to help the bend clear the brake line outlets on the master cylinder.