In Case You Missed It
Firewall Forward: Installing the Firewall
Author Dave Prizio describes construction of the firewall itself, including the penetrations and the tools required.
Rapid Prototyping and Experimental Design
Sandwich panels, part 4-a simple, accurate method for molding flanged parts.
Ask the DAR
Recertifying a Homebuilt after major changes. Changing the gross weight when putting a Rans S6S on floats.