Ken, I've used the Superfly with standard resealable cartridges and with Campingaz resealable cartridges without problem. The Superfly does engage with the threads. It clamps onto the canister and is then screwed down.
Macsen, I think it is the same stove. GoGas became Karrimor became Go System so I guess it's just one of the old Karrimor models that is now branded Go System.