As you are aware, the vast majority of the tuning of the fbl system occurs in the 750. Transmitter configuration is comparstively minimal.
We use the transmitter for the following:
1. Setting cyclic rate via AFR/dual rate in any flight conditions where you want slower response than the maximum rate set in the cyclic rate menu in the 750.
2. Setting head gain (ail and ele gyro gain adjust as one parameter in 3D mode) and tail gyro gain.
3. Toggling between the two available banks AKA bank switching.
4. Setting head speeds if the 750's internal governor is used.
For #1, you have perhaps three flight conditions plus throttle hold. If you ever do any hovering, set the AFR/dual rate for AIL and ELE to 75% and tune to taste from there. Use some expo if you want as well. Adjust the other flight conditions for the desired cyclic rate. If 100% rate is too fast, then reduce the cyclic rate in the 750 a little. 280-300 d/s is a good start. 510 d/s works well for the tail (also set in the 750). set the maximum rates in the 750, and anything less in a given flight condition in the transmitter.
For #2, set head gain in the transmittter's gyro menu to 70% for aerobatics. Use at least this much in hover. Some models will allow A LOT more in hover if the swash rate for hover only is reduced a good deal. Set tail gain to about 65% for aerobatics or as much as you can run without a wag. In hover you can run about 90%. In the 750, make sure the SBus channels for head gain and rud gain correspond to the transmitter channels that tune those functions.
For #3, refer to the gyro and transmitter manuals and use one of the digital channel to toggle between the two banks. Turn bank switching on in the 750. Assign the bank switching digital channel to your flight condition switch so the banks switch as desired. You don't have to use bannk switching. Many guys just tune the gyro as one bank for all flight conditions.
For #4, I'll reserve comment until I know about how you are handling your governing. If you use the ESC governor, you use the transmitter's throttle curves to set the desired headpseeds in your various flight conditions. The 16 is not unusual in this regard.
Ask specific questions, and I'll fill in any gaps.
Team Futaba Team Kontronik USA