Nice work, all coming along.  Is that tea or coffee in them mugs keeping you going or maybe hot chocolate whilst you work on past midnight?!

Are you building it's entire length in 4mm scale? 

Hi merlin46. Thanks for the interest. I've only got 16' for the scenic part of the layout. This will include a bend at each end. So at a rough guess, I'd say it will measure about 10' in length. I'm not sure how long it would be in 4mm scale but I'm guessing about 19 or 20ft?