With the right wing nearly finished, I decided that something to store it in would be a really good idea, so I went to Bunnings and bought 4 castors and 2 sheets of MDF. I used one of the end ribs as a template and then enlarged the cut out by about 10 mm all round to allow for some foam padding. It should work OK, bigger wheels would have been nice but I was not feeling like spending money so I went cheap with $4 dollar castor style wheels.
Two 1.2m x 600 MDF end bits and planks, plus 4 castors
2 hours later
Other side, can't really see any difference which is good