Hi steve
i have 2 Ron thompson gangsta's and 2 Ron thompsom zensorflex's and i got 42 ft actual height, it was very usable
you will need a extra zensorflex for the 3 ft ( it will actually gain you just over 6 ft )
it takes some working out, i spent about 30 - 45 mins working out which would fit in which, you can then get coloured tape and tape each side of the joints so you know what goes in what, it will just speed it up in the future
i personally found the pole very stable, i am sure it will have more flex that the 500 quid poles, but we are talking poles for under 200 quid here and honeslty for occasional use at that height, i would be very happy