Bob, here's a file with the changes I made. To download it, right-click and select "save As", "Save File As", "Save Link As" or something like that.
I've also included a cheat sheet that shows what combination of FasTrack pieces are needed for specific lengths. I've found that I waste a lot of time trying to fit various combinations of small pieces, so now I just measure with the tape, then consult the cheat sheet.
In your case, the opening on the main track was 3.75". If you look at the cheat sheet, there is no combo that works. However, if you look further down the sheet, you'll see there is one for 13.75", so that's the one I used. The opening in the next siding was 8.75 and the sheet shows there was a combo for it.
The 3rd opening was a problem. No combo worked because the tracks were off-center and didn't meet at a straight angle. So, here's what I did (see photos):
- I selected the section between the curves and moved it out of the way.
- I added a 10" and 5" to both ends of the empty section.
- I moved the section back in place over the tracks I added.
- I removed the added tracks from one side and measured the opening.
- It was close to 9.25" and I found the combo for it.
- I added that combo to both sides of the section and it all fit.
Note that I also moved the left side of the storage tracks to the right and added a 10" track coming out of the curve. I did this because you had an "S" curve there that could cause problems. Trains don't like changing directions from one curve to the next without a straight section between them. You can move it back if you want by simply taking out the 10" track, moving the turnouts and the first parts of the sidings over and then adding 10" tracks to the 3 sidings.
Tip: If you orient the layout so the longest part is on the X axis, you get a larger area to work with and a larger view of your design. It also helps to locate it near the 0:0 corner so the rulers go along the top and down the left side as positive numbers. You'll see what I mean when you open the SCARM file.