Cassette configurations to support platters having different diameters

A cassette assembly comprising:

• a base cassette having a base and opposing first and second sidewalls, the first and second sidewalls having a first plurality of spaced-apart grooves configured to support an outermost perimeter of each of a first plurality of disc-shaped platters having a first diameter of nominally 95 millimeters, mm;
• and
• opposing first and second inserts configured to contactingly engage the respective first and second sidewalls of the base cassette, the first and second inserts comprising a second plurality of spaced-apart grooves configured to, responsive to installation of the first and second inserts onto the base cassette, contactingly support an outermost perimeter of each of a second plurality of disc-shaped platters having a smaller, second diameter less than the first diameter;
• wherein each of the first and second sidewalls comprise at least one drainage hole configured to facilitate removal of fluid from an interior of the base cassette, and wherein each of the first and second inserts comprises an attachment hook configured for insertion through the associated at least one drainage hole to contactingly secure the respective first insert to the first sidewall and the second insert to the second sidewall.