Just made this using 350s (getting the bug for larger models) for a friends son's birthday on Saturday. Unfortunately it does not stand by itself but on two legs I reckon that's very tricky anyway.

How about making a stand from some round balloons with a water weight?

Looks really good, but can I ask one question.....why the orange tail ?

The tail was a moment of madness clearly. Didn't really think about it til you said something. May change it to the dark blue I used on the sides.

How does a water weight work? Do you just fill a balloon with water?

Phoenix did a tutorial, I think this is it? bases-t4326.html?hilit=water weight