Ozz, I haven't needed to do this mod but I think I would use the anti tip brakets that are on all the new ranges. One on a back leg and one on a front leg should secure it. look at them on this website just as an example:
http://www.geappliances.com/search/f...e/10000138.htm You could cut the back off and just attach them to the floor. Should be easy enough to fabricate something on your own. Just a thought, Jim