I've just replaced the photocopier at work and have retained the dead
one with the hope of using some of the parts in it to build an 88-note
piano roll perforator.

I've read some good reports on Bob Essex's MIDster punch in the MMD
Archives but wonder if anyone has used this design to punch 88-note
piano rolls?  Ideally, I guess, I'd like to build something with
interchangeable punch heads so that in the future I might be able to
punch different formats (with different sized holes) as I acquire other
instruments.

Thanks
Mark A. Williamson
Woodburn, New South Wales, Australia