I had what I thought was a good index, but after getting motivated by this post, I did a big improvement.
I designed two brackets to bolt to the frame rail (the front one utilizes the existing 5/6" bolt. I included slot cuts in the brackets to allow for adjustments. They are bent at the notch points in the attached .dfx file.
After bolting to the frame, I used a notched piece of 1x1 angle 41.75" long that serves as the index edge guide. Using a cut off nail head in the torch end, I easily lined up the edge guide to exactly match the Hypertherm cut head. Finally, I cut and sanded the adjusted edge flush (on both ends) so that I can exactly reposition it if I need to remove and reinstall.
Crossfire index brackets v3.dxf (465.2 KB)