Built a tapered Armin wing for my TT as a glider experiment. Flies quite nicely although I might remove the big curved wing tips which seem to make it want to roll even after trimming it in (they most likely aren't symmetrical). This is all a prototype for my 120% TT build I'm planning. Might add a larger vertical stabiliser as well.
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If you were then to straighten out the lines on the horizontal stabilizer, just enough to add some more stability? Wow! You may really be on to something, here!