RE: proper ID
Here it is from the rule book...
4.7: Identification. All models shall be identified by the contestant’s AMA license number permanently affixed to the upper side of the right hand lifting surface or to each side of the fuselage or vertical stabilizer. The height of the numerals must be at least one (1) inch. Both stroke and width shall be such as to enable ready recognition.
4.7.1: Borrowed or shared aircraft shall carry temporary identification, as shall repaired aircraft if deemed necessary by the Contest Director. Such identification shall consist of the AMA license number of the contestant operating the model affixed to or written on the model in any way which conforms to the standard set forth in 4.7. Temporary identification numbers may be affixed in any manner which will withstand the rigors of flight
Scott