You know, the more i look at this the moe you see westcotts brilliance when it came to track planning.You have a built in reversing loop that is completly hidden and if you build it with enough space(reducing this section of the plan by only 25% perhaps) you can have a through staging yard with a mainline run through and east and west hidden yards.This can be done without haveing to add any other connections to the mainline.doing so could create a real wiring nightmare seeing as you already have one reverse loop in play to boot.Not that it couldnt be done,i am sure it could.it'll take a better man then me to figure it out though.