Hi Tom,
Yes I remember these wings, I used to cut them as a bit of a hobby with some custom CNC equipment I developed during my Engineering days at University. I stopped manufacturing almost 10 years ago but I’ll have a dig around for the old manuals with CG details and website etc. I’ll post back once I have something for you, if you have any questions just let me know.
The wings fly pretty well, they don’t suffer from the ‘death spiral’ problems that plagued many of the other wings back in the day. You can pretty much pull full up elevator with no throttle and they just mush down in a benign way. That being said, I’d go with the speedy motor, they are quite rigid wings and very stable at speed. If you do go high power, make sure you use some fairly hefty servos (~18g type) as reflex on this flying wing puts more strain on the servos than a conventional airframe.
Matt