I actually liked the Federation version for an earlier show - but no one seems to mention it. Maybe, because it did'nt kill the Hero and end the Series!
Just thought Id say this
The gun (well the middle bit anyway) as it appeared in Captin Zep still exists.
It was found in a Vis Effects cadge at BBC Telivsion Centre Stuck in a corner, years after its use,
(photos to follow)