I'm looking to get the FSM for my 15 Challenger. I see Tech Authority has the CD for $135. I also found the manuals in pdf format file for $15 on a website that sells all kinds of manuals but they call it a service and repair manual. Has anyone bought the pdf format file and if so, is it worth it? They claim that this is the exact same manual used by Techs at the dealerships. Any better options? The third option I've heard of is Alldata, but for my 02 Durango, it wasn't very helpful.