Nice one John.
I did some outline etch designs for the Laminate underframe some time ago, as well as a master for the CIE version of the Commonwealth bogie sides.
My main issue was to capture the roof and side strapping detail while keeping the build and solder work required relatively easy. (ya know, cut, bend, bolt or solder with minimal parts). Like yourself, floating rather than progressing it (just too busy on other projects currently). But who knows!