I have decided to investigate making my own test roll using a 12
character per inch typerwriter.  The problem is I have encounted is the
advancement of the platen is not variable.  I could add a short piece
of .038 stainless steel rod in one of the strikers.  This would provide
the holes I need for cutting.  Does anyone know if a typewriter that
has a variable platen advancer that I could pruchase. I was also
thinking of a computer driven typewriter (one that has solenoids to
activate each striker) and have the software written to interpret the
holes by a laser scanner.  This would be an ideal method of coping
Skinner rolls