Guys, been following the thread for a while. The problem I see with the machine that Ed found is that the lines are not made straight but rather at an angle in relation to the edges of the foil. Since the threads on a bolt are corkscrewed (obviously since that is their job). If you could lengthen the bolt and cause it to move to one side while you crank it, it should create straight lines. All one would have to do is weld a nut on each side of the housing. Then if you were to pull the sheet through and crank at the same time you should get a perfect looking tin sheet.
I am not good at explaining my thoughts so hope you could bare through it.
I am not good at explaining my thoughts so hope you could bare through it.