Moving rapidly on with the Road van body, the instructions suggest that you fit the ends first and once I filed of an offending etching cusp, the ends fit nicely.
My recently acquired RSU has come into its own on this build. Using it allows me to use the probe to hold pieces in place while tacking them. After tinning the edges of the ends, sides and the fold down on the floor pan, tacking it together with the RSU became a breeze. I ran the microflame gently down the joints to join up the dots and hey presto.
It may just be me but it seemed so much easier than my previous efforts with van bodies. In fairness, the kit is well designed and that helps too.