Torqued motor mount bolts using the metal lock nuts - quite hard to turn; you definately want these to stay put!
Once that was done, I studied / trial fit the windshield. Other builders say that they're able to raise-up the aft edge of the windshield in order to obtain additional headroom. This may be a bit of a challenge, since it does not appear to want to fit the transparency at this point; I'll have to study the plans and other builder websites for hints.