DonM I had to look it up to see what you meant. That's a very interesting system.
And they say they've already set the spine.
Yep as Steve said once when he had that same driver directions are hard to understand in the booklet that they include but I figured it out easily. I think folks think they are gonna break something using the wrench when it torque's. Honma could do a better job explaining the non-rotating adapter system. Probably the Japanese to English translation.
My Honma interest goes back to their high quality persimmon woods early 90's. I still play one from time to time.
I think enough of the XP-1 driver that I ordered the 18* frwy and 22* hybrid. I have not been impressed much by new higher tech until the Honma XP-1 as it fits my old senior swing better than any others that I have hit.