I've revived this thread becuase it has a link to the other one about the bridge doctor.

I have just ordered and receive done from Stew-Mac (first class service) and had it installed by Brian Rodgers, in my still-trying-to-get-it-right Mugen THE78/12.

We came across a couple of issues. First the guitar being a 12-string, locating the securing screw was difficult. Second, it would have been nice if things were sized in mm not inches. Third the instructions in places take a bit of interpreting, where for example they refer to an item not labelled on the diagram. There is also one Lulu of a grammatical error that makes the instructions say exactly the opposite of what they mean, in one place, but a bit of head scratching resulted in an interpretation.

But the biggest problem was the dowel, the critical thing (I guess you could call it a thrust-rod) that carries thrust from the new under-bridge block to the tail-block. It had been routed, not turned, and the grain was at about 45% to the axis. So upon trying to put some pressure on, it sheared across the grain. We had to go and get a bit of dowel, turn it down to the right diameter, and make a new thrust rod.

We now wait for the guitar to settle down to do the fine-tuning, and report back.