Working along at my usual glacial pace, I've been adding more siding, as well as cutting the convoluted roof sections, using scribed sheet to represent the roofing boards on the interior, which will also act as a substrate for the corrugated roofing sections. This may not be technically accurate, but I think I can live with that, as several other aspects of the framing are non standard too, though the modified king post truss is reasonably authentic.
Naturally I couldn't get both pieces of roof from one sheet, so back to the LHS we go!

