Any of yall used one of these?

I guess the answer is...........make your exhaust system out of water pipe LMAO
So how does a dyi guy do it themselves? Why does this machine not work and an exhaust pipe bending machine does? They seem to do the same thing . Maybe bending it a little and then moving the pipe a 1/4" or so and having a lot of patience would do it . I've always wanted to try it but couldn't get the nerve up to buy the machine .