Is "Nightshift" a slang term for a disc variance, or is it actually referring to discs made on the graveyard shift?
If so, what is different about those discs? They should be molded under approximately the same temp and pressure, the only difference I can think of is that the temperature and water content of the raw plastic beads could vary slightly as the ambient conditions change, or that the cooling rate would also vary, depending on the ambient conditions.
But since we are talking about SoCal, how much change could there be?
Night Shift refers to the PM shift which took a few liberties with the formula of plastics we were using. One of those liberties produced the Star plastic prototypes which we originally referred to as Night Shift.