Here you see how an abutment allows an adhesive bead to be applied from outside the box: in fact it's what's called 'Gluing outside the box' in my TED talk.
Ordinarily this volume is available to liquid fuel or battery-packs prior to sealing, though when the drone's complete I need to figure out where best to stow ballast to suit both hydrodynamic and aerodynamic needs, as just four motors will allow it to hover, fly in ground-effect and plane on surfaces besides water... so I'll park packs elsewhere when it comes to proof-of-concept.
Meanwhile I'll seal edges with an undercoat because (a) it's cheaper than resin and (b) prevents spray-paint from dissolving the foam.
And now if you'll excuse me, there's a chicken roll with my name on it?
