im new to all this r/c airplanes stuff............i bought a used futaba skysport 4 transmitter on 72.510 mhz ch 36 i would like to change it to a differant channel but i was told im not allowed to due so.that its illegal. can someone plz advise me if this is true. and if so then why do the put it in front of the transmitter so u can pull it out.............maybe im just that gullible or stupid but

thnx for any help
chuck