Nice build. I love the attention to detail. You did well.
Keep the Tap Handles. Your VaJayJay handle matches the phallic nature of tap 3 viewed from the side. It is a His/Hers kind of setup...love it.
Infact I vote that you rename your next "light beer for friends that don't like dark...
Caveat all this with saying that I have built Jeeps for a long time, raced the Baja 1000 as the crew chief of a team and know how to weld. But I am no certified professional.
You need no more than 1" square tube in a 16 guage variety. Triangles are your friend during your design process...