Hi, Help! I'm hoping to find a technical specialist who could program a modification to my EOS 1DX cameras. I am wildlife photog who wishes to program the AF-ON button to switch from Ap Priority 5.6, to bracket one stop Ap priority, to any given mode; 3 modes in circuit (2 preconceived) at press of AF-ON button (I use the AE Lock button for auto focus). Would this be possible to program on my 6 1SXs? I often need to switch to these modes very quickly... thanks, David