Brickworks Machinery

If you have the HO scale Walthers Cornerstone Brickworks factory kit, you might have noticed that the instructions show dotted lines where internal machinery sits inside the building. The base of the model also has raised lines molded in where this machinery would be placed. However, I can find no reference anywhere as to what this machinery is or where you can get it. I even called Walthers, but have not yet heard back. In any case, I designed my own.

Update -- The mystery has been solved. It turns out that Walthers uses the exact same building for their "Brickworks" and "Northern Light & Power Powerhouse" kits. There is an interior kit for the latter that includes generators and other items (see posted photo). Well, now my Brickworks building has two 3D printed generators, but we'll just pretend these machines make bricks.