I mentioned it on the other thread, so may as well say here too,
I,ve used scaffold bar, its mega thick walled ( approx 5mm ), plus it was free from some building work on the house
fits a treat too, nicely proportioned to the roll hoop & my back stays.
Ok ok, i know its not CDS but if the wotsit hits the fan enough for that to bend then i,ll be a gonner anyways .
cheers
andy