Hi Invtrd, thanks very much for your reply.
The Medusas are very much at the front of my list, I have a 028 -056 - 1900 at the moment in another plane, it is a super motor, top notch. I was actually thinking of using the very same motor with their 1:4.4 gearbox for this plane, it's interesting to see your recomendation for the larger diameter type. The battery pack you used for motorcalc is the exact size I have! That's one h#ll of a prop needed there!