I'm hoping to put together a "T-Dawg" soon, but theres a bit of a materials issue down here.
It seems no-one uses the swaged pipe, and I'm scratching for alternatives.
I can easily get a 4.2 mtr. length of gal pipe, which I could leave in one pece just for home, or make up a less than ideal joiner.
An option I'm looking at today, is a telescopic pool cleaning pole similar to this one. I wouldnt trust the locking cam and am thinking of drilling a 1/8 inch hole through at my set lengths to pin it with a gal bolt or gal nail to enhance the lock.

I'm after your opinions on whether you think the pool pole will work...in my hand at the store it felt fairly substantial, but I still don't have any experience to appreciate the forces at work here.