"The S8x manual does not indicate whether current lift/sink is used to modify the instant STF arrows indication, nor whether wind is taken into account. The STF *is* based on the next waypoint, polar, and (I think) MacCready."

Lift/sink does drive the speed up slow down arrows. Wind does not, nor does the next waypoint. As well as polar and Mcready it also considers wing loading. When changing Mcready ballast or bug settings LX devices tell you the zero lift figures for Mcrwady STF and glide ratio.

By the way, if you want to look for a waypoint in a particular direction on your Oudie drag your finger in that direction on the screen - sort on any column heading by touching it, touch the wp you want and goto. But you surely know all this.