Hi Denis,
Check out my link here:
http://spirit-system.com/phpBB3/viewtopic.php?f=20&t=2981I accomplished setting up Hard Deck Rescue on one channel with right hand TX lever,
and on another channel set up a toggle switch when activated turns on Automatic Return to Home position and Land the heli to the Return to home location you program in GeoLink. I set this up using a JR XP9303H TX with PWM Rx as well....
You could download the TREX 500 file and load it into the Spirit FBL just to see how I set it up.
And this did not require going to the SBUS route RX.
It should answer a lot of your questions.
Hope this helps;-)
Dave