Re: wetting wood to bend it. The one Balsa USA kit ( Taube, a truly unique World War 1 monoplane) I built had complex wingtips fashioned by bending several thin strips of balsa to the correct curvature, gluing them together, than sanding everything to a smooth curve. This absolutely required wetting the wood before bending to prevent it from being cracked. It was a lot of work and very dusty, especially all the sanding, to make wingtips this way but the result was very nice.
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