Does the v911 head look transplantable to a 9958? I don't like the perpetual tbe of the 9958 and prefer the flight characteristics of the solo pro.
Daryoon did a mod putting the SP head assembly onto a 9958, but I think it might be cheaper (and possibly no drilling required?) to buy the spare parts for a v911 head and assemble it on a 9958.
Found some cheap v911 spare parts here http://www.hobby-wing.com/v911-spare-parts.html