Screwing without screwing up.

[DIYSwede]

Thanks Tony - yet another brilliant aid, both the spreadsheet and its derivation!

This is one of these machining problems I've "just haven't gotten myself into yet",
just lessening the repeated DOCs on a somewhat intuitive "hunch"
(which with 20-20 hindsight was way off - took too big a bite in the last passes).

Following your derivation was to me a spiritual experience - but then I'm just a cheapskate!

Ta

Johan