Originally Posted by
PromptCritical
So, the Park DR tool came today and I spent a couple hours on the bike. The rear DR was waaaaay out. Like 15+mm. It is now less than 1mm out. I readjusted the B screw and the two limit screws (why are those things that get so gunked up always phillips head screws?).
BTW - the RD# is a DR-M750.
FWIW, they resemble Phillips but aren't. Best to use a flat head unless you can source the proper driver. They are easy to bugger with a Phillips.