I have a Delta 6 X 48 belt sander and have bought belts at the BORG and HF. They simply don’t last long. I thinking ceramic would be a better choice. I did try a zirconium belt a long time ago, but felt it to be too harsh. I generally run 80 grit. I’m also wanting to get belts for my 1 X 42 sanders. I have two and was thinking 100 grit and 220 grit. What belts are you all using?