Dan,
   I put my Strikefinder sensor under the right rear seat.  That location
gave me the best opportunity to put in a good size ground plane.  I had some
noise problems that I recently eliminated and am now waiting for some
weather to look at, but we don't get a lot of convective activity in
Southern California.  I'm told that it should be OK there by the
manufacturer, but I haven't done any skin mapping to see if it's the best
place.  I know that other builders have put theirs in the same place.
   Skip Slater