From of brass made the base of the gas tank fastener and connected by soldering. From brass rod made fasteners and cut threads. And made nuts out of the square bar. All this was soldered to the base attachment strips. after to try on painted the base with yellow paint. Polished strips.
To make a gas tank, I cut new blanks from a thick sheet of balsa and glued the frame. After that he glued with cardboard and painted with primer paint. I treated the tank with sandpaper and painted it again. And so I did three times. After the final treatment the gas tank was painted with yellow paint.
Using a brass tube as the rudder shaft and base soldered this structure. The tube was taken from the telescopic antenna of the radio receiver. After that with simulated bolts… and fixed on the base.