Oh, I didn't know that it's a matter of fair or unfair. I just tried to keep things simple and set an upper and lower limit for the design. The Aspach meeting reports should show several real, working examples in between those limits. There are even more, e.g. [link=http://www.modelflight.regheath.com/mf145/gallery.htm]here[/link] even a DC-3 (and there are more when you search that site). It's easy to do the math for their wing loading. Just build how you think it's best and see where you come out between those limits.

I never claimed that the original's cubic wing loading would give scale-like speed and behavior (though some people claim so) because I know that quad wing loading would. But the latter would indeed require a helium-filled gas bag and would be flyable only indoors, and the former would be quite fast - but it would not behave as twitchy as a fighter plane because it's a calm and stable configuration. The only relevant Re number problem would be less maximum lift coefficient (and aoa), but you wouldn't notice it at the high wing loading (and with flaps).

BTW, I found 95" wing span and 6.85 sqft (987 sqin) wing area for 1:12 scale, just to compare the figures. What I meant as an upper limit of weight and wing loading (34 oz/sqft) would make for the scale speed of a jet transport and not a DC-3, that's clear. But flight behavior would still be fine at this model size, and the model would land like a pattern model. One of the Aspach attendants (Bill Kleinbrahm) built airbus models with that wing loading and reports them flying much like trainer models (even landing if the slotted flaps work, being a Re number problem). The people building jet transport models handle even more than 40 oz/sqft, that's where "nasty" things begin. But they aren't really nasty if you don't think of a DC-3 but a DC-9 which just needs speed. You just have to know and account for that.

And may I mention again that small motors and batteries will save you more weight than a stick-and-tissue construction. BTW, 12.5 mph is slow flyer speed, 20 mph is park flyer speed, 30 mph is cruise speed of a thermal glider. You know how that handles. They all can take some wind if they are set up not too stable.