V2 still tips over unless you add a weight. I bought a flat fishing weight and used a chisel to cut it and glue it on it now works pretty well. I used to keel add-in model so I didn't need to reprint the boat. I am working on V3 with a tower to keep the ball stable. Keep in mind it only goes about 4 feet and not very fast due to the decrotive cabin. If you want an efficient balloon boat look at: https://www.thingiverse.com/thing:2783012
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