To follow Carl's lead and keep it in RRT, I also added some decking to show the separation of levels. This was done before David posted his V1D version, but I copied the decking over, I just didn't change it for the new hidden yard, etc.
Obviously, David and I have different workflows when it comes to RRT, especially with regard to elevations and 3D displays. Therefore, in order to display all the tracks above RRT's baseboard, I used RRT's "Grade/Elevate Track" feature to globally raise all tracks 9". The lowest track is now 0", the highest is 15", and this didn't change the grade percentages. I should have changed the highest elevation to something closer to 50", so I could have added legs, etc., but I didn't think of it last night, I just wanted to get rid of the negative elevations. BTW, there is a stray straight track in the lower left corner of David's versions. I meant to mention this earlier, but forgot.