Since I've started my wing kit, there are several places (on the rear spars) where I've run across a choice of dimpling or countersinking. So my curiousity led me to ask this question of whether a countersink or dimple makes are better (stronger, less prone to any trouble later) joint? To venture a guess, I'd say that dimples are better since you don't actually remove any material and that leaves more to support the rivet. But the more interesting question is for a 3 (or more) sheet sandwich (for example, doubler-rear spar-rib). Is a triple dimple better or is a dimple-countersink-flat joint better? My guess is dimple here again, but I'd like to know what some of you other (more experienced and/or educated) guys might think...