Well, I do not think I need to qualify this as a Gloat because I do not have the darn thing working yet. Since I never owned a belt sander and since I was at this auction and no body else seem to want to spend $10. on this decent looking sander, I raised the card and sure enough it followed me home. Now, I consider myself fairly mechanical and yet I have to admit. this thing has me stumped. I am somewhat embarresed to tell you I can not figure out how to get the sanding belt off and then how to get it back on again. Is there a "locking device on the forward spring tension wheel? The model is 315.11720 I will really appreciate any directions. I'm sure it's a simple procedure but I can't figure it out. thanks,