My gap varies between 1/16th and 1/8th as well. I sealed it up with DAP 230 "Dynaflex", which is a paintable sealant. I think it looks pretty good and also reduces the air entering the tail, and possibly even reduces drag slightly.
- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, "The Commuter"