"Andrew Mawson" wrote in message
Bosch angle grinder in toool box for last 7 years - no idea of price
Threading of hex bar simple job on lathe - took 10 minutes as I have the
appropriate tooling
Speed controller - haven't a clue as I didn't use one.

Andrew Mawson

So when can you start mass producing these and selling them to use for a
reasonable cost? Sure there must be a market for a gadget like that.

Rob