Still deciding what scale to build, either 1/4 or 1/5, but I've continued the research I find the full size uses a NACA 23017 at the root; and a NACA 4412 at the tip, but no information on how much washout.
Looking at this photo I see a pronounced twist at the tip so I will use as a guide.
Here are the two airfoils merged with 0º washout
Here is another good shot of the wing:
JG
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