I wasn't fully happy with the GUV roof - there was a thin bead of light visible along the join from the inside. I also discovered that I'd put the roof on the wrong way round from the original build. The top of the interior is a smidge lower than the outer sides, so it was possible to create a small rebate by running 3 strips of roof tape along the underside of the gutter. This would sit behind the top of the outer sides and with any luck gently compress on to the top of the inner side. It seems to work.. after 4 attempts to get the roof to sit right. We also had a discussion about the window bars, in the colour photos we have, they didn't seem to be cream coloured, and a browse through my colour books suggested that also some of the maroon vehicles had them in the body colour. Anyway, it looks better after repainting them.
So continuing the MMP theme - I'm now on a class 'B' tank. Having built two of these before, it's a nice little build. With a lot of small pieces of course, but they all fit.