Does anyone own a dual fuel portable gas/propane generator? Do you run it solely off of barbecue gas propane bottles, e.g. Blue Rhino? Any concerns? Will operating on propane only be completely clean with respect to carburetor and fuel lines (which is what killed my last one, one moment of forgetfulness to shut off fuel and run it dry after 7-8 years killed my current one ). This one is electric start and runs off propane bottles or gasoline but I would be running it only with propane.