Hi Robin, what a beautiful little tracked project. I haven't seen on of these before and I can't believe it is so small. What sort of engine do they run and what type of drive system does it have. Are they constructed of ply and aluminium. What was their purpose during their time of operation as they don't look like they would hold very much unless they had multiple trailers. The tracks look like a fabricated conveyer belt style which would be easily made and quite durable. I will be watching with much interest so keep the photo's coming.
Colin