slmpickins: I've been trying to practice drawing back the shot.
These wedges will not spin back on partial shots, punches, flops, pitches, or chips - as a general rule. Only on full shots at least 90%. Backspin will, however shorten these shots and they will stick. My experience is that attempting to 'spin back' after hitting yards beyond the hole is a low percentage shot and can easily cause you to go from birdie opportunity to par or worse. On full shots, they will spin back a bit with no spin applied - they can also be deadly with topspin when you need a few yards past their range- and will roll out predictably a couple yards or stop if uphill is a factor.
My advice - do not use backspin on full shots except rarely (e.g.,severe downwind/downhill) - and even then we are talking a 'shosh'. Never use full backspin on full shots (punches, flops, pitches and chips excepted- and these take practice). I say this because I have seen in multiplayer games that the odds of pulling off a stunning shot vs a poor one are about 1 in 10. As i said, a low percentage shot.