I know this sounds crazy, but our new Jotul Oslo which weighs in at 450 or so pounds moves around on our hearth. The hearth is extremely smooth. Not sure what kind of stone but am attaching picture. In photo you can see leg sticking over edge of hearth slightly. Dealer sent 2 guys to cut pipe and move it back. Since then, I have noticed the right front leg creeping gradually towards the front of hearth. Now I do have 2 girls who like to run and jump alot in the living room. I think it may be that vibration which is causing it to move? It was a simple matter for me to push it back into place, but I don't want to have to do this all the time, and I can only really do that when the stove is cool, and I plan on running this baby alot. Any suggestions on how to make it stay in place? I was thinking maybe epoxy 2 smallish metal plates to the hearth in front of the legs, using some kind of non combustible glue or whatever. Thanks for any ideas.