I'd been trying Plastic Whip (beginning from a standard Sleeper position) for a couple of days, but realized that practicing too much might result in some tenderness in my throwing shoulder from (quickly but gently) yanking the yoyo up and then going opposite in throwing the loop down. So I would try maybe 20 times a day for a couple of days...and then decided to move onto a couple of other things when it seemed it might take awhile to get PW down.
Fast forward a couple of weeks to today, and I decided to give it a whirl again, and I landed it on 2 of my first 5 trys! Of course, one of those tries wasn't completely correct, string-around-the-yoyo-wise
but as long as the loop went around the yoyo I was happy, and the details will work themselves out with time and proper attention and technique.