Epa on the throttle channel will not cause any issues. Turn it up to 110 and try to get it to initialize. Also check to make sure you do not have the throttle or brake exponential adjusted off 100%. I did this once accidentally and had a field day trying to get a bunch of equipment to work with my radio...
You can also increase the arming time on the castle link setup. IIRC that caused some issues with CC speed controls and spectrum radios. Never given me an issues so I leave it stock.
Epa on the throttle channel will not cause any issues. Turn it up to 110 and try to get it to initialize. Also check to make sure you do not have the throttle or brake exponential adjusted off 100%. I
Odd, caues someone said to crank the brake on the A trigger to full 125.