I wish some talented FT fan would bridge the gap between 3D printing and FT scratch builds. I would love to see, for example. The FT Explorer, 3d printed Cockpit and rudder\elevator section. Leaving the wing and fuselage still made out of dollar tree foam.. I'm sure many FT scratch builds could benefit from 3d printed parts. And it would still be 100% scratch build being made at home.
Not a bad idea, except now you're changing the weight of the plane.
I've bridged it somewhat, using a 3D printed firewall, and control horns, on my planes, but I've left things like the ailerons, rudder, and tail as being foam because 1) DTFB is still cheaper than 3D printing, and 2) it takes a heckuva lot less time to cut out a pattern on foam board than it does trying to 3D print something.
Now, a 3D printed cockpit isn't a bad idea; I'd consider doing something like that for say, the MiG-3 or the Mustang; however, it's still something I'd have to REALLY work at to get the detail I'd want for it, not to mention that the "glass" wouldn't be terribly clear (the "clear" ABS and PLA I've seen end up looking more like a hazy crystal than an actual clear glass when 3D printed, so it wouldn't be easy to see in)...