Well if you cut all the plastic off the top you won't have the handles, but that may not matter to you (I still have needed to move my keggle with 5 gal in it on occasion). I think it could work. I'd use a sharp razorblade to cut the plastic back, then cut the metal with your dermel or grinder, but stay back 1/4" from the rubber.
"People should not be afraid of their governments. Governments should be afraid of their people." - V
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash