Does the LC9 Trigger Need Shims?

[LCShively]

Hi Guys, I had a fella ask me about shims for a LC9
Since I don't have one, I am asking you what you think,

Helpful or waste of time?

This gentleman suggested .250" X .375" for a size, and since I would have to make new tooling for it, I am asking your opinion.
I can make .250" X .345" now, but I thought that might be a little thin, but looking at the parts break-down, maybe not.
He tried a proto-type set and said they fit, but I would like to get more feedback on if this is a good idea or not.

Thanks, L.C.