Hi Ray,
Though it wasn't intended to be taken seriously the thought of converting the Fore Street plan to N gauge set the old grey matter going and I have come up with an N Gauge plan which is based on Fore Street but with a few added embelishments.
The exact CJF point configuration as shown in his original plan just can't be done but with a bit of playing around I've managed to get it pretty close. With some careful gradient building, including rising & falling gradients to provide the necessary clearance under the main terminus station, the maximum gradient is 1 in 50. The overall size is 8ft x 6ft so it's certainly quite buildable in a 3rd bedroom.
I've left out the terminus platforms to better show the hidden (grey) trackwork. I've not shown any scenery or buildings at this stage but there is plenty of scope for individual interpretation. The only draw-back is the lack of storage sidings but I reckon there's enough space in the exposed siding to hold a reasonable selection of locos and rolling stock.
Anyway, here is my interpretation of it which I'm also going to post in the N Gauge Track Plans thread