I tried some for a weekend - not Aerostich but very similar. No they don't impinge on the radiator outlet, but I wasn't very happy with the fit either. You might have better luck.
I the end I figured, why mess with the whole straps-over-the-tank thing, when I can just attach the bags directly to the crash bars? It will carry the weight lower anyway. Haven't done it yet, and the tank panniers are not ideal since they don't have a good way to attach. I'm planning on looking for some bicycle panniers that may work.
Trevor