I donít believe the rudder faring would block the visibility. The RV4 & 6 showed the vertical stab as a possible location for a single strobe. Some used that spot but most used the wingtips as various strobe options came available and like Mel said there was some reflection off a low wing to be considered.
Arvada, CO BJC
RV12, #401, Flying 2013, N612PC
RV6, 1996-2010 sold