Mike, be careful using the big screwdriver......more 1100 stocks have been broken that way than can be counted. If you shoot an 1100, buy a wrench for it from Brownell's. The stock has to be removed every feww thousand rounds to replce the rebound spring anyway; it's something you'll use over and over again and it's not expensive....WAY cheaper than a new stock!!
Replace the spring every few thousand rounds? Dang ... I'm more than a couple three, four or more rounds overdue for replacing that spring and the gun still shoots as good as the day it was taken out of the box.
Not replacing the spring regularly (every 8,000 to 10,00 rounds or so ) is hard on both your bolt and receiver. It can also cause cycling problems. Do what you want; it's your gun, but a new $15 spring is pretty cheap insurance.
Wrap the blade end of a large screw driver with masking tape. 1/4 in from the end of the blade. Keep wrapping until the end of the screw driver just fits in the hole in the stock. This will act as a pilot and keep the screw driver centered, so you don't crack the stock. HMB