I stumbled across a long stainless spring, just the right turn size with slightly larger wire diameter, that improved Martin click-pawl.
I cut several Martin springs from it.
Unfortunately, all gone, but it really beefed up this 77W, which needed it for its steelhead niche.
You can always adjust spring tension by squeezing them shorter or stretching them longer.
Stainless is the best because of its natural work-hardening - while brass work hardens a bit, it's nothing like stainless, and part of the problem using ball-point pen springs.