getting some soon and was thinging about the run flat. can/have you driven on it for a long time? or is it just to be used in emergency situations like some one shooting at you? say last year when i blew a tire in MI and drove home on my ****ty spare, 300 mi lets say could i have done that with the flat tire on the mag runflats with out wrecking the tire, the runflat, or haveing poor control??