To keep the legs parallel I use a digital level on a clamp that mounts on the tube. One you can get at an electrical supply works just as well :wink:Not sure it is a good idea to make 6 bends to create a hairpin. When I bend dragster shoulder hoops I make them in 2 pieces, slip tube and resette weld as shown on another thread, but I only use 2 rosettes per side. If you just need 1 180 degree bend of a certain radius find someone with a CNC mandrel bender and have it bent.