I have a 12x and woud never sell it since its a simple but very easy programing radio. When you go in to the mix function you have mix1,mix2 and the restof them. when you go into these mixes , its simply to inh or activate the mix. Example mix 3 you might get THR to THR , now you get the chance to change the slave and the master chanel and then the switch its going to use , actualy pretty simple once you play with , and if you go back it to it
If you dont have a manual let me know , i think i might have a digital version.