We are starting to book a number of hours of flight time on these drones, and we are breaking a large number of propeller guards. We have also broken a few airframes. Replacement parts made by the original manufacturer are fairly expensive and hard to find.
Is it acceptable to 3D print replacement parts for the Mambo drones, as long as the replacement parts are functionally equivalent to the original parts?
If 3D replacement parts are allowable for competition use, are there any required or prohibited plastics from which the parts may be made?
If 3D replacement parts are allowable for competition, do they need to be printed with plastic of any particular color?