I would like to keep these old girls running. At my age I think these are going to be my forever vehicles. I was looking at the OTC Pegisys, pricey, but aren't they all. So many to chose from. I've always been pretty good at troubleshooting with basic instruments. I'm not the type that likes to throw parts at it until it works (too cheap). So far I've gotten by with help from this forum, a cheap repair manual, and code reader but I'd like to upgrade. Should I spend the money on a FSM and all the extra manuals that go with it (pricey), but still not as much as a scan tool? Advice please.