These pictures are kinda poor, and I was too lazy to actually remove the second drawer haha
its a soild oak fileing cabinet i didnt measure the thickness of the wood as I just wanted some feed back cause I have some idea on how to brace it, please keep in mind that im going to try and fix a 30-40 gallon sump in the base. and I know its open bottom but thats easily fixable haha.

Front

Side

In the first drawer slot

Inside/ Bottom