Hello John,
First check that stab and wing are zero/zero. How is the upline vertical? Does it drift towards the canopy also? If so, then drop the leading edge of the wing about 1/2 degree. When changing wing incidence, pay loase attention to how the airplane flies. It should fly level, not the a Giles-202 which flies with that unattractive nose high attitude.

If the upline is solid, try moving the CG back a few millimeters at a time. Just about 5mm can correct the canopy pull because you will require a touch of down for straight and level which will solve the pull on the downlines. I prefer my airplanes a litle towards the rear, some prefer more forward.

Do not get too concerned with pitching in the knife edge. Simply trim that out on the radio. The verticals are far more important in aerodynamic tuning.

Regards and happy flying,
Mark