Any of yall used one of these?

I know this is a one month old thread,but just as reference:
That kind of bender is far from good at doing thinner wall tubing for alot of reasons.

Most mufflershops that does compressionbent tubing wich is O.E style for our older cars use a Huth bender or similar.
Here is a link to Huths website where you can see how those benders are working on video and pics. Bending much thinner wall than the cheap benders does but still not all that thin,when i worked with exhaust we used 2mm wall tubing(0.07874")
for everything from 1 3/4" to 3" Od tubing. Notice the "backshoes" that follow the tubing around the radius with the appropriate resistance as the radius is being pushed towards the backshoes.
Huth Bending | Huth Ben Pearson International LLC

For thinnner wall tubing and for keeping the OD of the tubing as close to perfect as possible(this is relative to tube OD but lets just call it thinner) a mandrelbender(or realy a rotary draw bender with a mandrel) is required,these have a round radius with a serious clamping section by rotating the radius with the tubing clamped to it the tubing is drawn to the desired angle of bend while a wiperdie keeps the inside radius side of the tubing from wrinkling and with a mandrel sitting inside the tubing sticking out just past the tangencypoint of the bend and with a series of discs attached to the mandrel that keeps the tubing from collapsing and wrinkling. the mandrel with its disks are pulled back from the bend with a hydralic piston after the bend is completed (or at the very end of the drawmotion (pretty cool to see actualy since the tubing looks almost transparant as you see the discs move inside the tubing as they are pulled back)


For building custom stuff its not terribly diffictult to buy a bunch of mandrelbends then just start cutting them up and weld togheter as required,just keep the cuts true to the bend and it will work out well,keep in mind when you are welding that the tubing wallthicknes gets thinner on the outside radius and thicker on the insideradius to the stretch and compression during the bending. sometimes the standard 30-45-60-90 degree bends works fine as is after just triming the lenght other times 180degree bends are mor usefull to cut and well.
pay attention to available radiuses,its not always the smartest to use the thigtest radius available just because it looks like it uses the least space. also pay attention to wallthickness and steeltye when mixing and matching bends and brands.