could anyone help me,,i bought the plans to the woodsmith 4x36 belt sander that is used with your drill press,,,i have followed the plans to the letter,,and still cant get it to operate,,i even turned the wooden roller on a lathe and is completely round,,but when you install the belt reguardless how much tension you put on the belt it,, the roller just spins,,will not grab and hold the belt,,,has anyone ever built this and if so maybe you could help me out a little,,,thank you