SGS are complete ****
I tried a roll cab once a couple of years ago, by the time they had sent the third replacement in as many months because the castors fell apart, and on one of them, two drawers roller bearings also collapsed within a week of having it, I asked for a full refund when the third unit collapsed.
And no it was not overloaded, whole cab had less than 12kg of tools in it the second time the castors collapsed.
The industrial range Halfords roll cabinet I bought 4 years before is still going strong, and is only surpassed by my MAC tools maximiser I bought over 20 years ago.