I used the 12 ton and pipe on my entire cage (not done yet). Say what you want about pipe but it is better than a stock roof and WAY more affordable. I spent about $175 on pipe, got a bender for free from a buddy, and bought a harbor freight chop saw on sale for $60 which I split with another friend.
Did this bumper a while back out of 1.5" pipe:
My cage, incomplete, primed the welds, couldn't resist playing a little in the driveway.
1.25" pipe:
My friend steve, 1.25" pipe, 12 ton bender, and an angle grinder