I took the brass spinner nut and the three bladed Master Airscrew off and replaced them with an aluminum spinner nut and a two bladed 12x6 APC prop. This removed approximately 1.75 ounces off the nose moving the CG back to approximately 76mm. Before flying it again, I returned the elevator trim back to zero. This time the plane flew much better and it only required a couple of clicks of up elevator trim. Which tells me the CG of 68-72mm stated in the instructions is definitely too far forward.

Next time I go out and fly it, I'll mix in about 10% rudder into the ailerons. See how that goes.