Finally learned how to do rabbet joints properly - not as hard as I thought. The walls are fine although I think if inside and outside were conjoined by a 5 mm spacer on the same page it would make alignment easier. A little disappointed there was no ground (floor) for the barn (not required for my use though). Needs fill and some painting on the foamboard edges to finish but otherwise an easy build.
[3 of 5 Stars!]