Go for it. We need more kit bashers in the world. I added 30% to the rudder and it could stand a bit more fixed stab, too.

Fun plane. Solid as a rock.

Are you doing a full flying "T"? I seem to remember some rule-of-thumb for setting incidence in a "T" tail for having the control surface so far above the datum . . . but I'll be darned if I can remember what it was.