Thank-you for the replies.
I have been using an Aluminium pole for the last 2 1/2 years (when I started window cleaning)that I bought off an auction site for £50, the pole is in 3 sections and only weighs 905g, the brush that came with it weighs 390g with 2 pencil jets.
I only clean a few FSG and a couple of conservatory roofs a year. I also use the pole for 2 houses where I cannot reach the upper windows because of an extension with a squeegee and fliq pad. I am not taking on more houses, just single storey.
So the CLX is too whippy and 1420g, the SLX is more rigid and lighter at 1270g.
The brush I am looking at weighs 245g and I will get 2 100 degree fan jets.