I use a carrier similar to yours, for the 3pt, but do not find the need for casters (thanks for the idea!). However, yours appears to have a quick tach system (I see the slots in the top connector but can't see what is welded on the upright posts near the bottom) which would indicate you let loose of it and might roll this 'box' around on the deck, or elsewhere. Could you tell us more? Will it roll with a load of wood?