Hey folks, progress has been slow just the last little while, as I had some indecision regarding materials. In the end, I decided to do this with plasticard for the sake of durability.
Also, in these two images, you can see that I've added what few rivets there are on these. I'm using liquid green stuff, which when just dabbed on the surface will bubble. It can take two or three coats, but I find it easier in 15mm than trying to use rod or similar. I've heard superglue will serve the same purpose. I've also started to add stowage (most visible here is the pair of spare T16 wheels, and an extra wheel for a 6pdr.)
I hope to cast the final bits of crew on Monday, and finish the assembly on Wednesday or Thursday, when the resin dries.