Have also used the Tamiya R370 without any problem (i.e. the black motor with the size of R280). Good speed for destroyer (1/200), but a bit fast for 1/350 battleships when running in full speed ...
Tried Tamiya R370 motors (size of R280), with good result, but just a bit fast for 1/350 battleship when running in full speed, for very good for 1/200 destroyers ...