From a letter printed in Table Top Talk January 1964…

“…Along with Herb Roig, have recently worked out a few innovations for the Roster System. Main punch involves assigning a set of two numbers to a tray. One number remains fixed (say 5), the other number (say 25) is reduced as the tray take casualties. The smaller number (5) is the number of shots per tray – the larger number (25), the number of shots a tray can take. As the larger number is reduced, the number of shots per tray is reduced…”