Very nice, It'd be interesting to see some more of your coasters. I know you've done some good stuff with the other game and are held in quite high regard.
How you finding working with the editor? I know you had serious reservations in previous incarnations.
How are you finding the coaster friction model(s)?
There's been some frustration from some around here, that feel it's way to "high".
I've not really found it to be the case, except with some coaster styles, that still seem reasonable and realistic.
Such as the slowest/highest friction being the kiddie coaster.
My only complaints so far are a lack of height markers, which would be extremely useful in general.