[TowerTalk] mechanical construction of 80m vertical

[Ian]

Hi.

I'd like to replace my bent and buckled 67ft vertical (built out of junk)
with a more sturdy version. In the UK I can get 6m (19.6ft) lengths of
aluminium tubing but the question is what size/guage of tubing should I go
for to balance stength with ease of putting the thing up in the air -
perferably  by walking it up single handed. Has anyone had experiences
building a vertical or even a larger one that could be linear loaded for
160m..

thanks

Ian GM0TGE