1. make the Reynolds Number work in your favor
2. make the parts large enough to be less fragile and easier to shape and handle
3. most importnatly, allow high enough a price point to let yourself be profitable
I don't think .46 size is gonna do that for you.
I see you have found what Andy's favorite engine size is.
The manufacturing end of things we can handle... most people here knows we like to take the work out of the hands of the modeler (the tedious stuff anyways), and it should be more like that in today's market. Maybe thats why we don't see fowler flaps on anything. Manufactures don't want to produce it.
I don't think Reynolds numbers are really a concern on a design sporting 50" wide. Something 120" wide will benefit from the extra attention in Reynolds numbers.
Price point? That's a tough consideration. For many aspects that I'm not allowed to get into.
Bottom line, it seems to me that STOL designs are almost absent due to the complexity of producing such a product for a "narrow" market. I just wish there was more of it out there. I consider STOL designs part of the "funky" swatch of projects any one builder could bring to the field. Auto-gyros, Channel Wings, Canard designs, and all moving elevators are rare things at the field. I guess I'm getting tired of seeing the standard milk-carton fuse with an 8-ribbed wing strapped on with a rubber band. Sure people like it, and it gets some into the hobby without a hole lot of cash, but it just seems to me that the real neat funky planes are dying out.