How many of you use the lids on your tubs? We are just starting to setup a rack and was wondering we have 2 storage racks downstairs that would more than be able to carry the weight. But unlike the ones I see everyone using I would not be able to get the levels close enough together to prevent a jailbreak. So I was just wondering does the lids help or hinder with heat, humidity etc? Doing all my research so I can set it up right the first time.