Thanks! see what practice can doI must give you your credit!! You make terrific bends using the pipe bender, what made you quit trying the steel tube and tube bender?
Over the years I've gotten used to & developed a technique with my pipe bender, where I could mathematically manipulate the pipe (if that even makes sense) like (50) "pumps" would make ~90* bend (every time)
I could confidently measure, mark & make multiple bends on (1) piece, like I've done on many of my frames
Like, I would/could make (2) separate but, aligned bends on a piece (like the (2) bends @ the rear of the seat bottom)
...then "turn it" (~90*) to bend it in the middle (top of the rollbar) ta bring 'em together
...& Boom! (1) big, continuous piece all of the way up to the front axle
I found that a tube bender "performs it's duties" in a totally different way
...so, its more difficult ta make "the same bend everytime"
...& even the marking/lay out is totally different too
Keep in mind that the "middle of the bend" will be in the middle of the die
...& so, on a pipe bender you can simply & easily "line up" a mark on your pipe "directly" with the mark on the die
...but, on a tube bender, the mark on the die is kinda "around the corner" so ya gotta "eye it" (which is NOT very accurate I must say)
...& then, tryin' ta make multiple bends "by eye" in (1) piece had my "head a spinnin'"
So, for my sanity, I "took a brake" from that chaos
...but will probably "try again" sometime
* If ya "start off" bending tube, with a tube bender
...& not tryin' ta "switch" to a new system
...ya may have better luck than me