Ball python rack

Ok in the next couple weeks I'm planning to build a rack to allow for expansion of my collection. I want the rack to be able to hold 3 sizes of tubs for hatchlings juvies and adults. I can't seem to find a brand of tub that offers three sizes with the same height. Assuming I'm not going to find them my thought was I would build each shelf tall enough to hold the tallest tub then I could just leave the lids on the other shorter tubs. Anyone tried this before? Or can anyone think of any issues with this plan? Thanks in advance.

You can find same height tubs probably not for all 3 size tubs though

Sterilite 6 quarts and 12 quarts have the same height

Sterilite 7 quarts and 15 quart have the same heights

Sterilite 15 quarts and 32 quarts have the same heights

Best would be to check sterilite and rubbermaid sites to give you an idea, also check this site it will give you an idea on Iris tub's sizes http://www.reptiletubs.com/

I just built mine with the Sterilite 15qt, 28qt, and 41qt tubs - all within 1/8" of each other in height.

Here's a link to the thread:
http://ball-pythons.net/forums/showt...w-modular-rack