No need to decide. Just get six shoe boxes to hold parts, and build them all at the same time. If Paperfan can build 4 battleships simultaneously, you can do six planes! 
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Recent builds: RMS Queen Mary 2, Paris Opera House
In the shipyard: USS Missouri, DKM Graf Zeppelin, RV Calypso.
Future builds: IJN Akagi, SS United States, HMVS Cerberus, and lots more!
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