Is mounting a Suntour Cyclone MKII RD on a Simplex DO (older, non-threaded) just a matter of tapping the hole, or does a stop have to be ground into the DO as well?
*this is a not an 'important', sought-after or collectible frame, and I don't care about modifying it- though if it does require grinding a stop I may just slap a claw on instead.