It's buried in a toolroom tips video. Excellent content as always from Robin:
Yep, you're right on with the taper. Self locking would be a pain, so steeper like the INT series seems sensible. I've found some taper reamers that look promising, so I'll order up and give it a go!
I'm transitioning from rough fit with persuasion to engineering fit. Getting the two base castings dead nuts on, both centre to centre distance and bore size Such that they're a beautiful sliding fit even right up next to each other was a bit of a revelation!
