wasn't UDI "invented" by mikado for the vstaby system?
since vstaby is used for helicopters, 12 channels should be plenty.
you would have to request more channels from mikado for udi, after that the other vendors would have to adapt it.
hasn't jeti already his ex-bus for more channels?
in my mind the RC vendors lack some comon standard for an bus system, curenntly every one has its own.
sum/ppm signal is the one all speak, but its 2014 who likes analog signals...
and since no vendor trusts another with the bus systems, i think we have to live with figuring out witch little box is combatible with wich vendor bus system bevore buing it, sadly =(
UDI seams to becoming the new comon ground for heli staby systems, even tough it has diverend names depending on the vendor of the staby system.