The start of the swingarm. The axle bosses are machined billet roundstock, and slipped into the ID of the pipe. The pipe used on the project was .188 wall 1-3/4" DOM tubing. due to the size of this tubing, i elected to build a 3 piece swingarm fork, welded up. Why? It suited the design to come, of the slider pivots for the downtubes. The tubing is in a homebrew welding table to keep things lined up and square during welding.