Service Bulletins from Hitec
#TX-20100520 Aurora 9 Transmitter - Using EPA and D/R Functions Create Dead Zone in Stick Travel
We have confirmed customer reports of a software bug involving the End Point Adjustment and Dual Rate functions. When both functions are at their highest settings, there is a significant dead zone at the stick endpoints. Until this issue is resolved in a future software update, it is advisable for customers to keep either the D/R or EPA setting at 125% or less and the other at 120% or less.
....so I guess there may be an update to the software coming soon.