I made further progress on the BG on Sunday but the weather has been terrible so Photos have had to wait until today. I have assembled the underframe trussing and the solebars and made a start detailing the underframe castings - adding cable to the dynamo etc. The battery box looks to be quite a crude casting with no back as is usual with cast battery boxes. I am still trying to decide whether to make a new one out of brass or just make a back for the cast one. No further progress with the 4mm one but they are now more or less both at the same state of assembly. I have taken a couple of together shots and until you view them together you don't really get an appreciation of how much bigger all round that O gauge is.