I usually avoid Bunnings but their Tactix structural foam modular storage system is quite good. It is ~3mm thick so perhaps they fall between Tstak and Tough boxes in both strength and weight.
https://www.bunnings.com.au/tactix-modular-2-drawer-tool-chest_p6120422
Anyone else using them?
It's hard to find Tough boxes, L-boxx-s and Tstak's where I live. I really would have preferred a completely Tstak drawer setup but I cannot get them locally.
I have a trolley, three small, one large and two drawer boxes.