Birth of the Blue Missile

Demon, I never watched the video so I dont know. Here is what I have experienced with all tools that cost a tenth of the real ones. You need to tweak them.
First get a slightly longer grade eight bolt for the front hoop,you want the solid shaft to go all the way through to the other side. The one they send you will bend.
Then if you are like me you take the thing apart and stamp numbers and individual degree marks into the mandrel and make a degree pointer. I then struck an indexing line on the face of the mandrel, this helps keep everything lined up. I did a number of test bends on some cheaper pipe bought for that purpose and discovered you need to over bend by 5*and also figured out how far the center of the bend is from the face of the mandrel for indexing.
Finally you need an method of putting a perfectly straight line all the way down the tube. Im using a piece of drywall style 'hat channel' an old carpenter's trick.
Other than that is a piece of cake.
The second main hoop[ turned out well. its 3" wider and 1" taller and has insets at the base that go to the floorpan.
Andrew