The 4mm scale model railway is not normally thought of when Small
spaces are concerned, but I am thinking of new scales for small
spaces. 00-z could use Z scale track, and could model 18inch
prototypes quite easily. better still would be TT-z (3mm/foot on Z
scale track. This would be ideal for 2foot prototypes in almost half
the space of 009. I'm planning to develop this scale for my model of
a Javanese Sugar plantation, which needs 0-10-0 and 0-8-0 locos, and
quite conveniently, Marklin make Z scale models of Large german Locos
making chassis readily available.
Perhaps if interest grows in TT-z and TT9 (3mmscale, 3foot prototypes)
I could start a group.
If your in Porthmadog this weekend, I've got my 005 models on display
(0-4-4-0 Mallet)