The folks at Van's Aircraft have alerted their builders that
RV-7/7A empennage kits shipped between July 1, 2004 and November 9,
2004 may have included an incorrect part.
According to Van's, "The horizontal flange of part HS-710 was
trimmed too short. (At least one builder who called 11-10-04 was
advised by Van’s tech help staff that the part was acceptable
before the problem was correctly identified.) While it is
physically possible to install the incorrect part, Van’s
recommends that it be replaced with the correct part. If you
determine you have received the incorrect part, contact Van’s
for a replacement."