Slermalling = slope soaring + thermalling The X1 is the perfect glider for this type of flying. AUW 2.33Kg gives it mass to keep the airspeed up in good air but the X1 is so efficient at low speeds too when sink hits and you need to fly conservatively at low-sink-rate in cruise mode with a clean wing.
Today we made a flying model of the battle bus from fortnite! It ended up being more of a blimp rather than a hot air balloon but propane regulators at that size would be hard to find, nevermind...