RE: 117 stealth.
I made one a few years back and it is still getting some air time. I made mine with an airfoil and kept the outlines fairly scale. The speed range is 10 - 45 mph and can be flown indoors too. AUW was 10 oz with a J-250 dd and 2 cell 850. It now has a CD motor with 3 cells, weights 8 oz, pure vertical and is insanely fast! EPP and depron construction.