Has anyone had experience using the dual series hex inverter logic noise buffers ...
The CD4069 circuit is good for 4 or 5 cell applications. The 74HC04 and 74HC14 versions are best if used only with 4-cell.
BTW, are any of you (with this problem) using 5-cell packs? If so, throw a 4-cell pack on the Rx and see if the "Y" connected digital servos work better.