ORIGINAL: Alex Voicu
Small update: added carbon fiber to the mounting plates for the motor, gear, rudder servo and tailwheel. The firewall is made of 4mm liteply and 200g glassfiber on both sides, but i'm thinking about replacing it with something stronger. I added 1.5 mm balsa sheets to the sides of the fuselage box and put it together to make sure all parts fit perfectly. So far so good.
Very impressive work on this! One suggestion for weight savings is to construct the firewall from 1/4" cross grain balsa laminated with CF cloth. I use small dowels embedded in the balsa to create the mounting hardpoints. This is very strong and much lighter than a plywood, or CF laminated plywood firewall. The firewall I did for my Integral came out to 1.6 oz. You can do the same for the landing gear mounts. If you really want to save weight in the main landing gear mounts, I recommend studying how Wistmodel designed the Vivat, Prestige and Bravo. There's nothing else out there that I know of that is so light and durable as their system.