The Harbor Freight Tubing roller is in a league of its own based on one simple principle.....price. For ~ $180 you can purchase the HF tubing roller which includes the machine and three roller die sets, 1.0" 1.5" and 2.0" round tube dies. However at such a low price point there is definitely room from improvement. The Weld on Wings are the biggest single improvement you can make to the HF tubing roller.
The Weld on Wings reduce the total effort required to rolling tube an honest ~50%. This is because they extend the total width of the bottom rollers 6" for the first hole and 12" for the second hole. The further out the outer two rollers are the easier it is for you to roll your material.
To make assembly easy, the wings are welded on to the existing side plates with out having to disassemble the tubing roller. The 4 Weld On Wing extensions are laser cut from 3/16" steel, and the 4 spacer plates are laser cut from 1/4" steel.
HF TUBING ROLLER SIDE PLATE WINGS INSTRUCTIONS.pdf
For an in depth detailed review along with great useful tips and tricks to mastering the HF tubing roller click this link here.