Really liked the course. Made a couple of test notes.
2nd - could footbridge be an obstruction if ball lies before it ?
4th - couple of bricks off green.
10th - i'd consider putting a small bit of fairway to left of bunkers, so that the drive becomes a risk instead of a dead end where players are forced to play short.
12th - you probably already plan to anyway, make all down the right side o.b. Maybe a small pot bunker between 2 bunkers to right of green to catch people trying to drive in 1. Might make more people think of two separate iron approaches, especially in a tournament.
18th - fairway bunker around 260 yard mark i'd move 15-20 yards to the right behind bunkers in rough. Not alot of space to get past. Dunno if left bunker around the same area are needed, as rough and long grass for looks would be enough of a issue. Last bunker on left side before green there a slight bit of water, maybe enough to fill a pint, but would be a hazard.
Grandstands - liked the first one i saw, although may be close enough. Also liked the one on 18th. Didn't like 2nd one in roughly 4-6th.