I'm expecting delivery of the CF (straight sections) pole set this week...
My philosophy has always been to try and obtain the bit you want by adaption... adopt, adapt, improve, right?
So my local Wilko's have some child proof locks with (hurried shop measurement...) a 9mm ball end... reduced to 30p per pack (that's 4 ball ends... no, not bell ends...)
Under closer scrutiny (at home) with the vernier they turn out to be 9.5mm... doh. And no they don't click into the female bit... so I need to turn them down. Wish me luck ...