just fyi, the chain used when it was stolen can't be compared to the almax chain... they're completely different class. I'm not sure how the insurance company think you'll be lugging a 30kg chain around though. I'm sure it's only during night time, unless there is a clause in there. I've checked my policy and it's more where it's kept at night and then you 'just' need to prove it's locked while not there, and you've used 1 chain and a disc lock, that in my mind is enough. (you also have an alarm!) It'll be broken for parts so have a look online (did you data tag the fairing at all?)
PM me some details about it and I'll have a look over here...