RE: Delta static margin
Yup. I am drawing up some slightly different versions of the same basic aircraft, basically something that looks a bit like a Multiplex Pico Jet or Twin Jet (roughly) with a short nose, rear exhaust engine, tractor config, with enclosed pipe, etc. Designed as a fast sport flier. So the design iterations hover between a higher aspect ratio delta to a low aspect ratio flying wing with a touch of sweep. Thanks.
MJD