Johnny Luken wrote on Sun, Apr 12, 2015 09:39 PM UTC:
HG Muller,
The KN is indeed underused, although the inclusion of such a compound then requires the RK and KB for a complete set, which no longer work as distinct unions.
One could consider the gryffon and unicorn to be RK/BK compounds, temporal rather than spatial though that may considered a stretch by some...