RCTgo

Looks good so far.

Well, sometimes, support killer canT' do there job. Doesn't matter if you place on every square one of them. Sometimes it helps if you lower the land on this place, sometimes not.
The only other option is to turn out the view of supports in the graphic setup.

CoasterJoe's B&M Connectors are a beta version and so there are some parts missing.
So you should use the old method to conect the support with the track via a "vertical/horizontal cup" that is painted in the connectors color. So you can fake that. If the cup looks through the track infact of his length, use the Addon from "CPcisco" for MSJ, that has offset version of everything and helps you out.

One thing left, dont paint footers in other color than grey for the basement. That looks terrible!
Concrete is all the time grey, or pale brown if you want a dirt version.
Only the top steel plate is colored the same as the supports and the screws can have another color too, if you want.
Doens't matter if you don't go for realism, but if it comes to CSO's some realism aspects should be there to become the right look.

So long, Cobra