Centerlock SM-RT10 Lockring Wrench, External Spline

YOU NEED STRONG FILAMENT TO USE THIS FOR AN ACTUAL TOOL.
PLA+ OR STRONGER IS RECOMMENDED (SEE COMMENTS).

Lockring socket wrench for Shimano SM-RT10 rotors, which has the same diameter and spline as hollowtech bottom brackets. The SM-RT10 has actually two different splines, one on the outer edge which is the one compliant to hollowtech and one on the inner edge of the lockring, which is unique to centerlock rotors like SM-RT10 and not compatible with the cassette socket wrench, like earlier centerlock lockring models used to be. Despite the socket being of the same spline as hollowtech, I've modified the socket to be much shallower to be more compatible with the shallow lockring, whereas hollowtech wrench is too deep for convenience. This socket is not meant for hollowtech bottom brackets, not recommended to even try, a genuine hollowtech socket wrench clears that job way better, while this will most likely fail. The socket is made for use with either 30mm wrench or 1/2" (~12.2mm) socket drive wrench. Tightening the centerlock lockring requires reasonable amount of torque, so use your best choices to print this as strong as possible to make wrench last. If you use PLA, be sure to use large nozzle, 0.8mm is quite big enough already, because too tiny nozzle may result too brittle product.