Maybe use it as a vehicle based BOB? I've got a Craftsman rolling box with a telescoping handle that I use for work stuff. Looked at the FatMax but needed a larger main compartment for my own use. I will say that I see a fair number of them, the FatMax's that is, on film sets and they're not babied.

Worst case, re-gift it to the local Habitat for Humanity or a similar group?