Fixed nose side pieces together with blobs of 5-min epoxy.
A bit more agonising about the instructions, and trimmed more glass from the floor, and constructed a template from this line for dishing the sides. Roughed out the profile for the bottom of one side to match this template with a poly grinding wheel, leaving 3/4" of foam at the deepest point. Roughed out the rest, then paused to think some more. A LONG think, because I have to attend to some "honey-do's"