If you can do that speed with UC on imagine what you can do without it the only diffrence is you need a club member that wont die if he has to run a couple of steps and let go of the sticks a few inches lower when you land
for me symetrical wing sections mean drag... why do i want to drag two wings bottom to bottom through the air and have to fly at a AoA to get lift when with a flatter bottom section i can be thinner and lift with the whole plane at 0 incidence. just the way the wind tunnel in my head works.
Talking of gliders my next design uses a wing and section derived from an fast electric glider