Basically a controllable CO2 inflator with a back up pump in it. There's a cheaper alu version, but there seems to be some ambiguity over the length of that one, plus the lack of reviews means I'll probably give it a miss. But thought it was worth posting as an option for anyone who was after the same type of thing as me.
I think I found the idea pump for what I was after, Genuine Innovations Second Wind.
Basically a controllable CO2 inflator with a back up pump in it. There's a cheaper alu version, but there seems to be some ambiguity over the length of that one, plus the lack of reviews means I'll probably give it a miss. But thought it was worth posting as an option for anyone who was after the same type of thing as me.