I mentioned this a few pages ago. If you're gonna use propane bottles, you're gonna use a propane adapter (and at 10 bucks for a 1 lb bottle of isopro, vs 2 bucks for a 1 lb Coleman bottle, it won't take long). And the adapter will provide adequate clearance between the bottle shoulder and the stove.I'm thinking about grinding off the bottom ridge on the new GS-220 (the ridge that is rubbing against the iso can in this picture). Can anyone see a problem with that? Far as I can tell it serves no purpose. Rubs on the propane and will make mounting it to my drawer more difficult.
But to answer your question, grinding it off will have no ill effect on the stove.