A few comments never forget the cool side / ambient air temps come primarily from the room with tubs and racks so what temp you plan on keeping your room will determine how well they work.
I would use the lids on. It would SAVE a TON of cleaning / disinfect time! Many claim it is fast but if you are planning to disinfect and follow the instructions on the Disinfectant it just can't be.
google particle board out gassing before you use it. It should be sealed or the no voc type be used. Pvcx offers a viable alternative.
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