Chapter 3 - Frame Modification
Around the same time I made the engine mounts (May 2016), I made the necessary mods to the frame, as well.
First, I made the new downtube - simple and effective. Potentially stiffer than the original, better load path. I also lengthened the swingarm by about 3 inches:
Added some metal to blend it into the head tube structure and stiffen things up a bit: