Really way cool, Shaun! A very nicely done ... the tractor and chassis is great, as is the container stradler carrier.
Olli designed a container stradler as well, a while back, which is what Legion might have been thinking of...it can be found here, in the middle of the page, as a "van carrier":
Others/ Military and Zivil - Olli's Papermodels
Between the straddler carrier, your shipside crane and the tractor/chassis shuttle, you'll have most of the makings of a container port, once the ship is built!
Excellent work which I'm sure Barry would have loved as accessories for his container ship!
Cheers!
Jim