I would agree with Missy that 'less is more'. The plan as it stands is far too complicated, and I don't think it is going to capture Padstow (well, acording to the trackplan in the links in your previous post). I'll now just toss out some random thoughts (its late Friday night here so theres a few beers behind this).
If I was designing a track plan for this, I would locate the station bulding in the center (or maginally offset) and include the wharf trackage as well. It helps set the scene.
I would have a hard think about how you are going to operate this (and not just at exhibitions). How are you going to shunt the sidings without a decent length backshunt? You say that you would like to take it to some local shows. Your plan here might work for an exhibition, but it also has to work for the other 360 days of the year when its not at an exhibition.
With your space avaliable, Is it possible to use the back wall of the garage for the fiddle yard (putting the layout into an L shape)? If its behind the layout it is not going to be easily accessable for operation. If you could run the main line across the bridge
For my current layout Paekakariki (NZ prototype) I made a 3D scale model (ah la Barry Norman) to see if it would work visually. I'm not convinced that your current plan will 'work'
The layout is N gauge (TT scale) and 12' long not counting the staging yards. Even having built this, There are still things I would want to change now, but can't for a variety of reasons (mostly space and baseboard geometry).
Cheers,
Rhys.
(Sorry this is a bit blunt, its just how us Kiwi's are made)