I'm with awright and Glueman2. I made a rose arbor with gate and used the above mentioned HF roller. I'm not sure how you would use the the ram you have but without rolling the tubing it will crinkle and buckle. I made my arbor out of 1" 1/8" wall square tube. They sell separate rolls for 3/4" square tube that I put in my lathe and machined out to take the 1". Making rolls for square tube is a lot easier than for round tube. I think the additional rolls were like $40, hard to make for that cheap.

The rams sound cool and I wish I had those for a big gate I've been gathering materials for.