Windshield not cranking closed on the bottom edge

1941 K1. The windshield won't crank down tight on the bottom edge. The top seals tight, but the bottom still has about a two finger gap when the crank is turned to fully closed. Do I start by adjusting the top or could it just be a bottom adjustment or both?

Set the windscreen in place then adjust the hinges and mechanics to match. Do not force anything. Cleanliness is #1.