I have fixed RFTs on my GS350 many times. In fact, all four where patched. No issues at all. It is only a question of how long you have to drive on the tire before fixing it. Most of my flats where local, but one time I had to cross a bridge and the tunnel to get to Brooklyn and fix it at my shop of choosing (I pretty much gave up on the tire and decided to go all the way home). The tire was done. Needed a new one.