1. There's no way to put as much force on a cog by hand, as when standing on the pedals. So after installing & riding a cog for the first time, it will tighten more than your wrench can do it.

2. Thus, you should re-tighten your lockring after a ride or two. We can appreciate the attempt to put alot of force on the lockring upon its initial install, but the cog can and does tighten up quite a bit due to the chain. So rather than "boot it" with your foot, just re-tighten the ring by hand after riding and you'll be good to go.

3. You can easily break a cheap lockring with a hand wrench - cheap metal is cheap metal. A Surly, Phil, or Dura-Ace are all great,and if you break those by hand, please come back and post about it.

4. As for Mr. Campy, well, those Campy parts are very, very special and take a special proprietary 10-lb. monkey wrench from Harbor Freight to install properly. Please use that special tool from now on. If you're not sure, you can call Mr. Ignoramo Campagnolo & ask him. He's at 1-800-LIL-BABY.