I jsut camea cross this product and was wondering if its worth the effort or not. http://www.amazon.com/Improved-Electric-Chainsaw-Sharpener-Grinder/dp/B0011UJSDI/ref=pd_bbs_8?ie=UTF8&s=hi&qid=1207765734&sr=8-8 For now I tend to just buy cheap chains from Wally World and when they're dull they go in the recycle bin. This bugs me because its wasteful, but frankly its cheaper than buying quality chains that I then pay to have shrapened. I figure if I cna invest in a good sharpener that will do the job well that I can then move on to buying better quality chains. I go through maybe 3-4 chains a year, but they're like $7-8 apiece...everywhere else I've been to a basic 18" chain starts around $20 or so. Suggestions on how I cna better manage myself?