myozone:
Yes the AX12 has built in continuous rotation feature w/o hardware hack
I have found theoritical discussion on Arduino/AX12 interface here:
http://robosavvy.com/forum/viewtopic.php?t=1760&highlight=ax12+arduino
but sofar no actual working code
As anybody developped some demo code to control AX12 from Arduino ??? 
TIA
yves