I recently completed a Phaeton 90 with wings and stab at 0. Engine was given 2 deg down and 2 deg right thrust.

It required 8 clicks of down trim that was nuetralized by shimming 3/16 at the aft upper wing struts to yield abt -2 deg upper wing incidence. Rolls are better, sink rate for landings is better and very little down is now needed for inverted.

However, Balsa USA on their web site cites the top wing should have 1 - 1.5 deg positive relative to the bottom wing. To accomplish that would require releiving the dowel hole and shimming the front of saddle and forward N struts at the lower wing, harder than shimming the upper wing but doable. I don't however want to do it unless someone makes a very good arguement for doing so as currently I deem flight trim to be good and very well in line with what Rodney says has worked for him.