RE: V-Tail Incidence
The setting up of a vee tail on any model can pose problems for those not familiar with geometry. Simply put the dihedral joint and the centreline of the fuselage( plan view ) is where you should check the incidence....not the fuselage sides! The block sitting between the top surfaces of the tailplane is not a good reference point- although logically you would think it should be. Ideally the tailplane and wing should be 0,0 and if you lift the trailing edge of the tailplane about 1-1.5mm then you will be very close to the correct position...noting that because the fuselage in plan view is tapered that the tailplane will look wrong (when viewed from the side) is in fact correct.
Sometimes a nose heavy model will need a similar adjustment but that's another subject.
FWIW if you measure the centreline of the leading edge of the tailplane to the infill block and similarly the trailing edge you will find about 1.5mm ( on memory) variation..
Hope this helps, Trevor H