Mike has done a nice job on that TM as he does with all his bikes, but at the end of the day its still TM 250 weighing slightly less than a London bus.They never were and never will be a patch on an RH .
As for 75 RH models being common as muck in NZ i think you have been in Japan to long Marc,I know of more RHs in Australia than NZ now and there still aint that many.
I believe Mike took a mould off a Genuine 74 RH air box .