Slice backhand approach shot


I find I can slice well from the back of the court, but as soon as I know I'm going to have to move to the net after the shot it can go awry. I was wondering if anyone has any ideas on how to run through that shot without compromising the quality of the stroke. Also thoughts on when you should take your hand off the throat. I find when you have to move in fast to close to the net you're better off leaving the hand off the throat (as the Stanimal does at 7:44 in the below youtube clip), I find taking the hand off too early or too late can mess up the stroke. Just wondering what peoples thoughts are!?