Thank you very much for the great comments.Regarding "tricks and tools"I don't really have any !!!!!.Honestly I don't have any fancy tools like a Trumpf ,Eckold or Pulmax machine I do have a fairly well equipped home work shop but sheet metal fab tools amount to a Frost shrinker /stretcher a cheap bead roller and a 4ft folder .The rest of my armoury amounts to hammers ,dollies and various odd bits of scrap metal to beat 7 bells out of and hope the part comes out how I wanted it to be !!!!!!!!!!!!.Thanks again.