Glare shield and panel did not fit well together due to some misalignment of the angles of the slots. Changed angles of slots. Forward slot was expanded by stretching with 1/2 in divinicel and 1 layer of tongue depressors. Covered windscreen with divinicel to protect from heat. Heated slot with heat gun. Heated upper flange on panel. Placed into slot of glaresheild. Placed assembly on work table and jigged an additional 5 deg of angle between panel and glareshield. Let cool.
It worked! Panel and glareshield now fit nicely together.