Agreed. If you grind or file the pins, why bother with a special tool? Just use a screwdriver between the links and twist - it's quick and easy. If you don't need to swap your chain for different gearing, why not use the rivet link that you get free with the (DID) chain? Also, it's pretty quick and easy to remove the swinging arm to swap out the chain without splitting if you're removing the wheel anyway.