Gerard.....
If using 1/8" or 5/32" OD brass
tube, these Du-Bro benders are excellent....about $25.00 each.....but are capable or repeated radius bends
In both sizes, the aluminium legs unscrew from the body, this allows you to be more inventive with tube sets
There are threads on tube bending & annealing etc
PS...I agree with Ian ..the spring sets
are just a waste of money
Derek