backspin does virtuallly nothing with a 29mph tailwind with a mid iron. Just like in the real word the wind overpowers the spin and the ball effectively has no spin or sometimes even top spin (guess we all need some square groove clubs). Even with BS landing on a downslope will cause the ball to pitch forward and then roll out with any club except a very lofted wedge. The really great players (on here) can calculate their landing distance to drop the ball just before the crest of the hump allowing the hill to slow the ball and have it gently roll down the slope. Not being one of those I typically play a run up shot if there is an opening to the green since I know the ball will roll out considerablly more downwind.