Pretty simple. I was bored today so I thought I would document some small and easy tool modification. Not too long ago I took off some of the EGR junk on my Buick 350. I didn't get around to taking off the temperature vacuum switch tower. It's an eyesore. It needs a special tool which is basically a socket with a cut in it. I tried a crow's foot, and an end wrench and some stupid stuff with vice grips, no luck. The special tool is kind of spendy, so I thought I would sacrifice a crappy socket and a small amount of time instead of shelling out for something I'd use once. Tower in question Socket that would have broken anyway. Luckily the socket is deep enough. So far, so good. I made a little jig and drilled a hole at the deepest part of the socket. I used a cut off wheel and cut out the diameter of the hole all the way down. It looks a lot uglier than planned but will do the job. This could take out a number of similar things like an O2 sensor. Easy, simple and free.