On my latest DC-3 I did the bulkhead, a floor and a couple of seats. I guess I should have saved the bulkhead and floor templates. I roughed them out on card stock, then refined them before transferring to plastic. It was a lot of work and I kick myself for not saving them.
I did the Eduard civil Ju-52 with their PE detailing package. Even though it is not easy to see the interior (especially the cabin area), it sure adds to the kit- especially the cockpit. Would sure like something similar for a DC-3. Maybe we should just hope Eduard decides to do a 1:144 DC-3 and also such a detailing kit.
BTW, speaking of Minicraft, I see by the latest Squadron catalog that they have what is supposed to be a new issue 150. Hope it is as nice as their recent 172 kit!