Rich
Sounds like you got the bug to increase your layouts operations abilities. Your taking action sounds like me when I decided to find a way to add a Wye to my outside loop on two of the train boards after thinking it was not possible for ten 10 years the layout has been up permanently. With determination I found a way to add two switches to do this by cutting 1/4 inch off of each switch body and for fitting it. By trying the switches in where they had to be I saw what was needed and started cutting, no drawing or sketch. The job was done a couple of days.
During the original board built in 1977 and addition in 1988, I made sure I could reverse trains and have a figure 8 and oval on original board, an oval and two dog bones on the new train board and now a Wye on the outside loops around the layout, all reversing means.
With your layout on three unconnected levels your next challenge could be to connect the levels to each adjacent level. That will really open up operational options and add lot of fun action.
Charlie
