John, I took a look at your file. Even though I imagine the consensus would be not to put the double crossover on a grade, I moved the inner loop closer to the outer loop and added the crossover. I tried keeping the crossover and 4 lead tracks flat, but that made the grade going up to 8" too steep. I was going to try some other things, but noticed some things that needs to be fixed before you go any further.
One is clearance issues. I like to keep things 3" from the walls and sides, but you can use whatever distance you're comfortable with. To illustrate, I added some 3" wide rectangles along the left side, tops and bottom to show how close you are to the walls. It doesn't pay to to play with the grades until the clearances are closer to where they need to be.
Along that same line, I overlaid the double crossover at the bottom again to show that those mainlines are too close to the wall, but still far enough from each other.
The curved switch was added incorrectly and that's why you had to use flex track to make the connections. The problem is the Ross switch doesn't directly replace the GG O-72 curve. It needed to be connected to the straight track and then an O-72 curve cut to fill the gap.
I think you might be able to accomplish what you're after by moving the crossover back to the bottom by the curved switch, moving the left side of the inner mainline over to the left more, lowering your elevation over the yard to 6" to get the grade closer to 3%.
Anyway, that's what I'll be working on doing.
