On Jan 13, 9:11*pm, "JB" wrote:
It is probably so galled that you won't get it off without having to retap
anyway. *Too bad you can't just work around it.

Bummer



-- heating the Allen wrench with a heatgun while engaged with the
setscrew and turning
-- heating the Allen wrench to 450 degrees and then inserting it into
the setscrew and turning

No wonder the wrench bent ! .. you need to heat the alloy knob with
the heat gun .. as hot as you can get it .. with the hole to the top
so you can drip some thin oil in ... then if you like chill the
wrench ... and have a go ... your lucky the hex key still gets a
grip .. ....

need alloy as hot as possible
screw as cold as possible

slight nip clockwise first may break the bond

G ..