So I was finally able to buy a 2x72 grinder but now that I have it I'm disappointed but not sure if its something i did or the grinder. I've got it all set up and the tracking is good on it but as soon as I try to do any grinding if I push just hard enough to get any sparks so just a little bit of pressure the belt flys left or right and in a couple cases its come flying off. I'm hesitant to mention the brand but it is a good brand so its not some knock off. Am I doing something wrong? Any suggestions would be helpful.