Your concerns about downward pressure on both flaps & alierons are
well founded. I'd attach the rope to the forward end of the wing cuffs
and then pull forward with both wing ropes. This will require a tail
rope that pulls the other way. Raising the tail is a good idea. I have
seen too many gliders on their back at Minden after the rotor touched
down with an estimated 100 mph gust. Our ships are designed to fly and
they'll do it with or without the pilot on board. On a big bird, you
might consider 4 wing ropes. Personally, I only leave the ship
assembled when I'm spending the night right beside the bird and even
then I have been up checking things at 3:00 AM. Assembling even a big
bird with a wing assembly tool is painless. I use the new "Wing
Rigger", its 3 wheels will roll over rough ground and the third wheel
solves the kick stand issue (can't fall over when wing is lifted off
stand) Google WWW.WingRigger.com I'm not associated with this
product, just appreciate good engineering that solves a problem.
Hope this helps,
JJ