I ordered one of these from Toma Model Works in Japan to test out as an inexpensive chassis to build some dinkies on. At the moment, I'm fighting with worm placement, because a tenth of a millimeter is a big deal when getting gear trains running. So far, I have not had to use any special tools or skills to assemble the chassis, which at $60 shipped from Toma in Japan, is a pretty good deal.
Wouldn't it be something to see a return of something like a Joe Works Porter?
Go Build Something Awesome!