Thanks Nick
That's probably the perfect solution but not a cheap one! If I was going to spend that much money I'd buy one of your poles.
I also realise that a NN5 is going to introduce more weight at the highest point but getting a R1 isn't on the cards, especially as this is only a hobby.
I did some more investigation and see that Gitzo's monopods (
http://www.warehouseexpress.com/buy-...nopod/p1026587) have 3/8th female threads so I could get one of those and attach it to my tripod and rotator. - Not ideal but a possible option?
Have people done such things before?