I have played around quite a bit with side force generators. My favorite trick is to use full-chord airfoiled interplane struts on bipes that look like conventional "Z" struts, thanks to transparent covering. Have also done the same thing with cabane struts, and equipped them with controllable rudders to make them move opposite to the normal rudder, thus acting like coupled flaperons in knife edge. These vastly improved the bipe's knife-edge, cutting its knife-edge loop radius in half, and produced a nose-level, power-off knife edge glide, which I like.

Also tried putting detachable fins totalling about 20% of the wing area on the wings of a fun-fly monoplane; these were horribly ugly, and didn't improve knife edge all that much - pretty much a failure. Bipes are hard to beat in knife edge. I think that a bipe with a controllable cabane , and possibly, four controllable full chord interplane struts could be very entertaining without looking very weird.