@DoubleDAZ it's all good. We'll get there.
I've realigned this plan with the existing layout and removed the 4.25 Straight on the 155" side of the table. To be able to keep O54 curves, the 10 inch straight at the 45 inside corner would need either to be replaced with a custom length 6" piece or maybe a 5.5" piece would work instead. The picture below shows a 5.5 which doesn't make for perfect alignment at the opposite upper side of the curve (red arrow), but with a little skewing of the track joints it may line-up ok.
I also had to shorten some of the yard spurs a bit with the understanding that this will likely change more later.