Time to prep the heel blank:
First I chuck it up on the CNC table using Festool clamping elements, which fit into the 20 mm holes I had the CNC bore in the waste table.
I'm going to have it inlay a reinforcement spline (for cross grain strength) first
With the maple spline glued into place, I then have it surfaced flat first....
And it bores the 3 contact point holes (this is an articulated neck joint)
Then I have bore a tapered hole which is for the threaded insert
This is the thread cutting bit that I use....
To pre-thread the hole for the threaded insert
Ready for the insert, goes in easy
and here is the test fit.