Yup!
Just been and had a look at an old one I have in the garage & the sticker on the reservoir confirms it contains high pressure nitrogen & gives the serious injury etc warning if you try to disassemble it.
If all it needs to swap the reservoir position about is to remove the shock, this is only a 20 minute job- or that's how long it took me to swap shocks over on my ST2...
Go for it.