As a leg-up..
The 036 switch comes with a 1/4 curve. You'll want to include them on your route to the center crossover.
Note the two filler pieces between the switches on the inner loop. They are 6-12073. You need these to get the straights to cross-over to line-up. The leg of straights to the cross-over include 6-12014, 6-12024, 6-12026, and (2) 6-12073.
The verticals on your outer loop 6-12014, 6-12024, 6-12026. I couldn't read these directly on your layout image.
As an FYI, most FasTrack sections have the connections for power. You don't specifically need to purchase the track power terminal sections.
I took out one 10" piece on the inner/outer loops between the switches at your crossover. This tightened things up so the crossover would line-up.
Very easy to add 5" sections to the far left/right of the switches to keep the OA size the same. The layout above shows the extra 5" sections and maintains your original dimensions.
