Stretching the spring is actually going to make things worse.
It is the spring (red), that is pushing the actual electronic button (gray), not the plastic button (blue). So if you stretch the spring, it will still be blocked by the plastic button from the right (as it can't go any further right due to it resting on its rim) and since the spring is longer now, the only way it can extend/push is to the left, where the electronic button is. That results in the electronic button being pressed permanently. Been there, done that.
I personally hate the trigger, it's extremely light. I'm going to try to replace the electronic button with something stiffer (like the shift button).