Many thanks to all for your kind words!
For all its snappy appearance, the masking wasn't all that complicated, since it was (mercifully) mostly straight lines. Just a bit of patience, several different widths of Tamiya tape, and---a necessity, these days, with advancing years and marginally declining eyesight---my Optivisor knockoff from the local discount tool store.
These Minicraft 1/144 DC-3s [I have yet to try the newer Roden releases, which I'm told are much better replicas] are one of my favorite choices for between-major-project builds. They're relatively quick and easy to knock out, and I have an inspiring backlog of decals for various schemes, both military and civilian (and I seem to be adding new ones regularly). They're fun and rewarding without a lot of modeling angst involved.
Thanks again for taking the time to comment.