I'm starting to get bad connectivity in my sigelei box, probably from heating the spring, fortunately all the atties I'm using right now have an adjustable pin which remedies the situation for the time being but I'd like to fix the problem. It's pretty easy to open up these boxes and access the spring, should be very easy to replace, I already opened it up once to tighten up the button on mine, the hard part is knowing where to find a spring that is a good fit so I'm going on the off chance here that someone already did this and can help me out.