Great progress, Al.
Your home made method of elevating the track is brilliant. How are you notching the risers so they become flexible in the curves? I'm guessing it's just a saw or box cutter slice 1/2 way through every inch or so.
A guy could go broke doing it all with Woodland Scenics foam. Hopefully you find using foam helps quiet Fastrack. I look forward to your impressions once all is up and running. I might just rethink doing mine using your method.
Bruce