This FOX Xtreme glider is fantastic for slope soaring. I use it at my tubes and maze airport up on the cliffs with the wind set at 5mph. This thing is a blast to fly. It has Crow set up, wingtip smoke and if you want it can hover but best with no wind. It has plenty of power and is quite stable.
Make sure you check out all the different camera angles.
Channel 7 Wingtip smoke.
Channel 6 Crow settings.
Channel 5 High/Low rates.
Have fun and enjoy.