Well, after a 4 year break, maybe longer, this one is back on the table, at least until a kit I've ordered arrives.
I no longer have a computer so I've lost all my reference material, for now, and unfortunately most of the "plans" I had were in my head and now they're gone too.
First step on the large scratch build will be to try and figure out what I was thinking of doing with the tracks, there's a bit of an idea on paper for me to work with, and I've found a bunch of parts already laminated and cut out so at least I'm not starting with nothing.