Thanks for the offer, but I got tired of waiting so I disassembled my spare 100. I have the trigger return spring out. I am going to call a local custom spring manufacturer. Hopefully they will have something useable in stock or at least in their computer. It may take a while as they are in Wylder, Kentucky and I don't get down there all that often.
I will keep everyone up to date. It may be a waste of time but I'm going for it anyway.
As to your second comment, I don't think we can change the length of the pull, but you can certainly make the pull as smooth as any double action revolver, maybe better. I have worked on my carry 100 and will put it up against any revolver I have ever owned. It is incredibly smooth with absolutely no stacking. There is no mystery to doing it, just some thought and polishing. Actually a lot of polishing.
Good shooting,
Mike