Thanks for the replies. I guess I've been unknowingly using the lighter recoil spring in my no dash for a few years now without issues. However, I do have new springs and I will replace them with the heavier one.

Regarding the trigger play spring, I see the Midway springs are for TSW models and they do not list the 4506 or 4506-1. Are they the same?

__________________
I'm gonna grow fins.