Was wondering... I haven't yet looked at the RB yet, but, how about drop soaking the rear stabs in diluted white glue, and let it drip out? The 'new improved' stabs should get the needed lacking glue, plus hardens the soft balsa without deforming, apart reaching all the nooks and cranies....

That plus MKS glider servo in the tail... Should work like a champ....

Any thoughts? Drop/ Drip soaking the entire stab?