Here's a revised version with various tweaks, the most notable being that the incorrect down goods refuge loop is replaced by a more correct Up refuge siding. (That allowed the curve into the tunnel mouth to be much more flowing, more of a transition curve now.)     Is it a home or display layout? It's a fantasy design but it would primarily be a home layout. It would cross my entire living space and so it would have to be removable. And if it's removable then why not remove it to an
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