Chainsaw Repair

660Magnum, I finished reading the Sears manual. The 5/32 file was recommended for the Power Sharp version.  oops.   I have the non PS version and it recommended a 3/16 file.
 I have the original banana bar and chain and the chain seems to be heftier than the newer chains. I'm still mastering the art of hand filing. I'm sure I'm not the only one that has a hard time keeping the left and right cutters even.
    In the accessories section I noticed a chain (76LP-66) that does call for a 7/32 file.  So are there more/less aggressive chains that would use a different file while the pitch and gauge stay the same? Or am I over thinking this?

                                                      Chris