I drilled out the old pin from my gas assembly. I then installed my tapco piston and drilled a new hole. I went to the hardware store and purchased several different size "tapered pins". I drove the best fit pin into the piston and is very tight. I then grinded down what was left over. It still has the wobble like the original one, so I assume it is ok. Has anyone else used a tapered pin in there assembly? Also, do you think it will be fine using these?