Low wings can have problems with ground effect when landing, compresability can have an effect up to half span. Rear mounted motors need clearence (prop) when rotating, so be mounted higher then the thrust line must be directed to the CG to avoid neg. pitching?................Hughie.
I used this technique on three of my projects because I was on my own, all tested to BCAR Sect S. See Hugh's Flying Projects and photobucket handr2. Hughie.