Whatever you do, make sure that when you add this drag contraption, that the contraption itself doesn't weigh anything, or else you will be trying to land a heavier plane at a slower speed, which kind of goes against what I was taught about model aerodynamics.

If you ask me, the best quick fix is to bolt on a low pitched prop and learn to do steep approaches with a flaperon / elevator mix. Too forward of a CG will also make slow landings difficult or impossible.