Balsa Plans to 3D printing

I have a few balsa plans for different models. Whilst i have a machine I can laser cut, or shape pieces with a cnc router, but i'm keen to 3D print some of these plans. I can see the benefit of creating ways to put planes together for transport, and storage which becomes a unintended benefit when 3D printing parts. Plus with more parts 3D printed, after a crash, replacing the affected parts, rather than a whole model is appealing. So what I really want to know it, does anyone know how to draw/design the 3d models to print from?
 
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