The airplane was specifically designed to run on 8S. The plane flies very well on the Hacker A50 and 8S lipo. Finding a motor to fit and run on 10S is a real challenge.

Do you mind cutting/modifying the motor compartment?? Changes everything. I have put an awful lot of thought and effort into this question (basically over a year's worth), and the choices of outrunners to run on 10S that fit without modification is very, very slim.