Reg, thanks for info, nice to hear your well worn friendly pillow cases are put to good use!
So sounds like you use black food grade plastic box stored in fridge and for now adjust the humidity by opening and closing lid a crack. Your new larger box will be better at regulating humidity with adjustable vent holes. What about the temperature, most cheese wants to ripen-mature-age at ~50 F/10 C, our household fridge is at 40 F/4 C! I'm thinking about buying a small wine chiller with flat racks, I can control the temp and the humidity isn't pumped out down low with compressor like on big household fridges.