Hey Schwen!
I used to have the old 'Candle Thru' Arm', which I'm pretty certain is exactly the same effect...just with a candle, instead of...well...a torch!
In answer to your question - pretty much a self-working effect, very, very easy to pick up, and looks incredible to the audience too.
You do have to be a little cautious with the way you handle the tube, so as not to flash something you shouldn't (but that's just common sense, really).
Never got into Doves, for my cabaret stuff, so I really can't comment upon the final production I'm afraid; I'm sure there'll be a dove-worker hereabouts, who would be able to give you some views on the climax.
Hope this helps!
Rob