I don't know how plausible this would be, but what if, to get some more over/under action, you extended the BNSF extension in front of the doorway (using a removable bridge), and then had it go down and reconnect just after the roundhouse turn? This would require going with the bathroom-less option and probably losing Deer Lodge and the On30. Basically, it's turning the BNSF Connection into the third main and making Three Forks the out-and-return switching short line. Just a suggestion. And please post any progress you've made over the quarantine!
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