Brave man !!! LOL, it seems that according to light patterns we are good to go, did you happen to post your setting numbers and activation status? pos0,1 & 2 so I can compare to mine and Forrestt's? Thanks Bob, we may be on to something big !OK I am totally confused.
My ST-16 is Firmware version 03.01.b18 the latest version according to Yuneec.
On My ST-16 the "Flight Mode" switch is on Channel 5 or Switch A01.
When A01 is selected, I get 3 different settings for the Flight Mode. (Smart, Angle, RTH)
When A02 is selected I only see 2 changes on the middle lower display, and it only changes when RTH is selected.
I changed the settings for A01, and you can now see that the H (the tail light) only has Purple White in Safe mode and in Angle mode, and RED in RTH.
When I put A01 back to the -100% 0 100% I again have all 3 modes? Tail Light is Green (Safe Mode) Purple (Angle) and RED (RTH)
Soon as my batteries charge going to go out and test this and shoot some video of a SMART MODE take off.