There is always a way to modify anything, it just depends on how creative you are and now far you are willing to do. A trigger mod is quite simple for the Edge/Axis.

I did the same as mailboy 67.

I used a alan wrench that fit snug into the hole, cut it so it stuck out about 1/4" to hold the spring. Found a spring that would work at True Value hardware (It was actually twice as long as i needed, so i have 2 ;D). Works great! Cut the pull about in half (I don't have any way to measure). Best thing is, I didn't do any permanent modifications as to not void the warranty. All I have to do to put it back to factory is pull the alan wrench part and spring out and put in the new spring.