@GregCovey I have the Nimbus V1 from Foxtech. Their KFF_RDDRMIX is 0.5. The plane seems to fly fine with that and it does not seem to slip in turns, but there is no rudder enabled, ie the V-tail doesn’t move when one applies rudder stick, yet it does move with that rudder mix.
I tried using 6S 10.6Ah Titan LiIon batts (18650GA cells) which weigh 920g rather than the 1400g of a 6S 10Ah LiPo but the Titans couldn’t handle the current, getting very hot in the process and even melting the heatshrink over one of the tabs. Hence the reason for the dual battery board, to use a high C, low capacity pack (eg 6S, 75C 2200Mah) for hover and the low C LiIon’s for forward flight, increasing endurance.
Our airspeed sensor was DOA when we got the plane so replaced it but of course if one boots Arduplane without it attached then you can’t connect it later without rebooting, so I just made the silicon tubes longer, removed the 2 PCB’s and mounted the sensor under the battery. Thus the nose can be detached while loading a battery (and booting with the sensor attached) then the nose (with pitot tube) reattached.
The other change made to the params was changing Q_TRAN_PIT_MAX to 10 deg, this stops the aircraft from losing too much height during the transition, ie keeps it’s nose up better.