You got it team!
I used two 4 Ohm speakers in the CommVan, the BIG Tang Band in the tender and a laptop speaker, with a long, skinny enclosure in the boiler.
After running at the show this past November, I wasn’t happy with its performance. The CommVan will be rebuilt (hopefully this winter) with the correct dark gray bodies and some re-wiring of the current ERR electronics. I’m still deciding if I want to use the as-built spoked wheels / standard rods, or keep the Scullin discs and add roller bearing rods. I’ve got this frame, a “metric” frame & two sets of Scullins, but no spoked drivers.
As for the modified F unit fuel tank; to make a long story short, I forgot it in the machine shop when I left my former employer. I’ve yet to stop back in, maybe this week.