Well a little report and update.
Still working perfectly and in my view combining all the advantages of the lightness of a fishing pole with the convenience of a telescopic.
For 90% of my round I run it at 4 lengths - about 20ft - (out of a possible 6 or 7) with a seperately purchase rubber ferrule (foot) on the end of the 4th section.
The knurled adjusters and the clamps work well.
Even in the heat of the last few days I have run good days without feeling too knackered.