Ok all here is a question for ya. I just got started making knives and was wondering what the difference in belts are. I was given a well used (abused) 1x30 grinder and was out pricing 80 grit belts. Harbour freight sells a 5 pack for 2.99 but some other belts I see can go for $3 each. Do the more expensive belts last longer? It generally takes 1 belt per knife for the cheapies. for me. (5/32 O1 is my current steel choice)