Hello
I'm having this same issue with my 450l 3gx spins at least 180 on spool up.
I'm using a Dx6i tx and in rate mode (50%) I cannot seem to adjust the push rod far enough to eliminate the right tail yaw. In heading hold mode (66%) the tail still spins 180 to the right on spool up, but when I pick up into a hover the tail is rock solid. If I up the gain any higher the tail starts to wag and does not seem to help with the spool up problem. Can you elaborate on what it is you did to fix this or can anyone else help?
I'm having this same issue with my 450l 3gx spins at least 180 on spool up.
I'm using a Dx6i tx and in rate mode (50%) I cannot seem to adjust the push rod far enough to eliminate the right tail yaw. In heading hold mode (66%) the tail still spins 180 to the right on spool up, but when I pick up into a hover the tail is rock solid. If I up the gain any higher the tail starts to wag and does not seem to help with the spool up problem. Can you elaborate on what it is you did to fix this or can anyone else help?