Wow, thanks... I figured real world application here, does the clipped wing spit not perform better at low altitude & speed, - elliptical - high altitude/speed...? Does not apply to rc ? & The vg's... I suppose you need to work with that for best effects..? Dunno...Read in a magazine, & other in military aircraft.... For what it's worth, I enjoy building, flying is a bonus.. landing is terribly difficult for me yet, things happen too fast for me yet, but I'll get it...It's a blast for me