Thanks Dave.

I was thinking of just using an M10-1.50mm bolt in place on the tranny.... but was curious about the brass battery bolt extender used on tranny..... I'm pretty sure that anyone that used it ended up cross threading since the typical battery bolt extenders are mostly all 3/8 -16tpi.

they are very close, the 3/8" bolt is about 0.019" smaller and the pitch's are very close so the 3/8 -16 bolt will thread in the 10mm x 1.5 but a 10 x 1.5 bolt will not fit the 3/8