Dan, when you turn down the tumbler, did you take any metal off the fork for the link? I have an L&R Bedford lock and the fork has broken twice. It seems to be a weak point and I would be wary of thinning it even more.
You all have convinced me not to try to modify a small Siler. This winter, I will put together a couple of Siler kits I have picked up and hopefully learn something about lock building. Then I will decide which casting set to use - Manton, Blackely, or whatever.
So, first questions:
What size reamer to use for the hole in the sear?
Is there any way to heat treat lock parts with an acetylene torch? I don't have one and I'm not sure I want to buy one just for doing locks.
Thanks again to everyone who responded.
Dale H