First time poster, music box on its way, should get it next week.
Printing out some .pdf sheets I notice that the punch marks are normally a blue "x" but very occasionally there are a very small number of red "x"'s. What do the red "x" indicate?
Normal printer paper is classed at 20 lb weight, I'm assuming much too thin to put through a music box. Paper is also available in heavier/thicker weights such as 24 lb, 32 lb, 48 lb, etc, up to 110 lbs. Would printing the .pdf files directly onto 48 lb paper be thick enough, strong enough, to put through a music box? What would be the ideal paper weight to use? What would be the lightest weight paper you could get away using for a sample once-only test?