Ian (and others),
What values are you seeing in the SERVO display on your radio as you cycle through SD positions? Reason I ask is I just stumbled upon a solution to a problem that has been dogging me since January, I was sporadically getting fail safe / autoland behavior during flight, as well as sporadic won't-start behavior with rapid flashing yellow lights. For months I thought it was a battery firmware issue, but could never nail it down. I have 3 P2's and a dozen or so batteries, including a few NukeRC and LimeFuel packs. A motley collection for sure. Anyway, as I was running them all through Assistant 3.0, and getting flashing yellow non-start on a small percentage of starts, and grabbing screen shots of various Assistant screens, I realized that my SD values were just slightly off, or possibly on the edge of falling out of whatever band the Rx/FC considerd okay for the three GPS/ATTI/Manual values. So I went into the 14SG and assigned T2 to be able to trim that channel, and opened up the travel and limits to 100. (I don't recall their prior settings.). By trimming SD up and down via T2, With SERVO screen displayed, on each position of SD, I determined that Rx/FC have a fairly narrow range for those three modes, generally +/- 4 units on the channel as displayed on SERVO screen (not on Assistant screen). Note on the Assistant screen for SD / flight modes if you T2 trim outside that +/- 4 units range you end up in Failsafe quicksand. I *suspect* my problem was having travel limits on SD that were slightly off, and/or lack of calibration on 14SG or between 14SG And P2 that was *occassionally* resulting in channel 7 transmitted value to just fall outside the allowed/expected range and into Failsafe quicksand. I also noticed that Assistant and P2 don't always fall into quicksand at same value. Assistant will often show Failsafe one T2 click before P2 actually goes Failsafe.
Posting this in case anyone ever finds themself in inconsistent / random FS/autoland/won't-start with their 14SG (or 8) radio and your killer model. Setting the travel limits for that channel to 80 has been determined empirically to be the best alignment for the SD channel, on my radio. Others' settings may vary. Also curious as to any theories you have on how I ended up "off center" on SD transmitted values. Radio wear and tear, lack of radio calibration or sticks calibration, or Assistant issues, or ??? I don't ever recall mucking with travel / limit settings for SD in radio menus. Though I have set SH as enabler for SD nearest me to fly in Manual mode.
Regardless, stoked to have found the source of the flaky FS behavior. it nearly cost me another bird lost to Davey Jones locker in the Sea of Cortez, several times this year. Unexpected FS / Go Home when launching from a moving boat made for some exciting landing rescues.
Kelly