Doug,Matt,Claude,
Thanks for the input. I will check into all that. I'm just at concept stage and won't really get into this till Oct,, ,but will get wing/stab kits put together in the meantime.
Re the yaw stability I have those things in mind - also I'm moving the wing forward a little and sweeping the tips aft some. Net result will be to move the CG 25mm forward in the fuz. So I will get a reasonable re-distribution of side area to aft of the CG and a corresponding moment increase. Also should get a 'dihedral' effect in yaw due to the sweep.

Matt; By 'balance weight' do you mean; so as to balance the stab at the pivot or dynamically.

Brian