I have an 18 year old Stilh 028 Super Wood Boss. I figured I try to get a few more years out of it. I have replaced chains with Stihl chains and figured I would buy on line to save some money. From some searching here I found that Oregon is a well known brand (but some would say not as good as Stihl). I figured I would give them a try. Bought a 18" Pro Light bar, Pro-guard chain, and power mate sprocket. I have not changed the sprocket or bar since I bought it and figured it needed changing since I am now cutting 2cords of oak a year. Couple questions, the Power Mate sprocket is the rim system. It seems that a few people here thought it was a good system since you could just buy the rims to replace them or flip them. Is that a good switch to the rim type sprocket? Second, any reason that I should rethink the Pro light bar and Pro Guard chain? After reading through some of the threads on this site, I am afraid that this may be a safety chain that does not cut as well. Thanks!