Could I trim 1/2" from the tip? It will have to be shimmed as the hosel on the TM is .370 and the 950GH is .355.
OR a recommendation for another reasonably priced mid-high launch utility shaft? I can get the 950GH for less than $20 here in Japan.
The 950 GH utility shaft is .370" ....The 950GH (iron) is available in SR flex which is basically an in-between flex between regular and stiff which may suit your needs. 39.5" length is available, part code SRI-A16 PRO.
Alternatively, you could reverse engineer the utility shaft and soft step a stiff flex.
Not sure. Have you tried contacting Nippon and asking them directly? I'm sure they would be glad to answer your questions.