If you are having tracking trouble with the Grizzly, do a search on here and on Google for some great tips. I took some electrical tape and ran a strip on the center of the top pulley, and that helped a little bit.
DEFINATELY get some good belts. 3M, Norton, Klingspor, etc. DO NOT use the cheapies from Grizzly, they will irritate you to no end. I never even realized what torture I was subjecting myself to until I ordered some real belts from Pop's Knife Supply. Also, take a vac filter or other foam filter and tape it over the vents on the right hand side of the motor. It will keep metal flakes and dust out of the motor and extend life. If you lean too hard on the belts, you will increase your power draw and maybe throw a breaker. Let the belts do the work, and use NEW belts for any edge beveling.
Have fun!
Oh, and you will LOVE your grinder for handle work! Use that nice big area of slack belt below the platen.
--nathan