Hello, I am totally new to chainsaws and just purchased my first chainsaw (Poulan Pro 20” PP5020AV). I am about to purchase a chain sharpener and I need to ensure I get the correct grinding wheel for my chain. Question? Is a 3/16” grinding wheel used to sharpen a 3/8” chain? Oregon 20” D72 Vanguard chain that came with the PP5020AV. 3/8” pitch .050” gauge 25° top angle 10° down angle I am having a hard time finding information about electronic chain sharpeners. I have never sharpened a chainsaw chain before so I plan to purchase a Bench-top/Wall-Mount sharpener due to the added complexity of the sharpening the Vanguard chain which has a 10° down angle in addition to the 25° top angle. The chain sharpener I am considering is: ‘Bench Top/Wall Mount Chainsaw Chain Sharpener’ http://www.tscstores.com/BENCH-TOPWALL-MOUNT-CHAINSAW-CHAIN-SHARPENER-P7313.aspx Any thoughts/experience with this ‘Bench Top/Wall Mount Chainsaw Chain Sharpener’ currently on sale for $99.99 (reg. $199.99) at TSC Stores would also be appreciated. http://www.tscstores.com/BENCH-TOPWALL-MOUNT-CHAINSAW-CHAIN-SHARPENER-P7313.aspx Thanks in advance.