Grippy rings

So, I taped my rings with climbing tape and tried muscle ups tonight. I can now say that the grip on my rings is not holding me back anymore. My hands didn't even come close to slipping out of position. In fact, the glue from the climbing tape started seeping through from the adhesive side to the grippy cloth side, making for a truly sticky hold. The first set of muscle ups felt really awesome. But then the 15 minutes of hard jump roping for my cardio warmup and the weekend pull up fest on my new home pull up bar caught up with me. The next few sets really sucked, and my anterior serratus(?) and abs didn't have enough left to keep my shoulders from floating, which made the transition of rolling my shoulders over my hands really hard. At least that's the story I tell myself as to why my muscle ups started sucking even after taking the grip factor out of the equation.