I have only owned my grinder for about three months. I was having a hard time getting a flat grind on a tapered tang, especially at the butt end of the handle. I went to switch belts and found this... The backing on the belt I was using was missing what it left behind on my platen. lol. I am wondering if my platen is getting too hot and affecting the belts? Is it just cheap belts being affected by the warm/hot platen after some good use? I believe the belts i am currently using are the Zirconia type. The platen is inline with the tangent of the top and bottom idlers. Would a different platen material be better? I've seen carbide steel and some type of glass material. I noticed that the sousaphone stain is sort of inline with the mounting holes, I was thinking of giving the holes a slight chamfer, see if that might help. I am also checking it more often. any input would help.