Stealth,
Sounds like you took good precautions but were unlucky as the thieves had taste, but good move your mate getting an R1, chain it to that and you'll be safe.
Try an Almax chain next, best you can get. They were the people cutting all the oppositions chains at the NEC. They upset a few people doing that.
Really hope you have better luck next time. Nice choice with the 998R