Spinning wheel, now theres an excellent idea, only transition being speed up and slow down.
Even better should be able to manage that indoors in the warmth and light.
Hole in a table , dowel rod, top support, wings attached facing opposite ways, thats going to be fairly quick to knock up.
On an american forum about foamboard self build they suggested using the digital settings on a transmitter to check the before and after level flight trim for overall change, and then doing one side only for checking additional lift.
Though that requires first learning to fly an rc exactly