Ideas for rapidly changing out recoil spring on a Supermatic

Is anyone using something faster than drifting the spring pin to retain the part that holds one end of the recoil spring?
How about using a slip fit ejector pin with the small head holding it up?
CCI low noise with ISSU 10m targets is a great way to train but I'm too lazy to manually cycle the action so swapping in a slightly lighter spring when I want to do this, is my intention.
Ed