Bob,

You could probably use the wing as a reference to set the stab incidence. Normally, the wing will be at 0.5 to 1.0 of positive incidence (leading edge high), so relative to the wing, the stab would be at 0.5 to 1.0 of NEGATIVE incidence (leading edge low). If no one else chimes in with an actual value I would imagine that 0.75 degrees would be reasonable.

Teo