Pops, Flaps or no flaps? With that wing and the low weight, you probably aren't looking for the improved Cl flaps offer. And they do add complexity to the build, add weight to the plane, add drag when they aren't being used, and make it a little harder to mount and remove the wings. There should be an easier, lighter way to increase drag a lot when needed (so you can lower the nose without picking up airspeed). Maybe a big speed brake under the fuselage might be enough? Or maybe just make the rudder big enough (and the stall characteristics of the wing right) to allow fairly strong forward slips? That wouldn't add much weight, cost, or complexity and a highly effective rudder has other benefits.