What two files to make the two slots?
The screws I make for my locks are copied from the Brits and I use a 6" hacksaw with
the set filed off the teeth with a flat diamond file. I slot the screw head and then finish
it with an old acute angle knife file.Some time ago I got a phone call from an irate man
who said my lock screws with narrow slots was a pain in his back side.I told him to
learn to carefully file a screw driver to fit the slots and he'd have no more problems.
Lynton McKenzie once asked me if I had ever thought about what to do with a broken
mainspring. I told him "No,I had never given any thought to it"He said the old Brits
would heat it up,forge it flat and "strike up a turn screw" from it.ANY time you're around
a man with the level of ability Lynton had,it pays to listen to him.
Bob Roller