I made my tangential tool holders so the top of the holder is exactly at centre height. So I just have to put the holder upside down on something suitable (like brass) and press the tool down until it hits the surface and the job is done. Works for me.
Jim
Clever idea Jim!
I was lucky with my insert tool, it needed a single piece of shim so I super glued it to the tool holder - it's always on centre height now!