Hello- I did continue to use my dolphin, but with 0 selected for minutes to climb. No more slices.

It does hit right on the wheel, due to the angles in the shallow end. But because it only hit once, then backed off in the other direction, I believe the force is less.

Pool is closed now due to non cooperative temperatures.

I will continue to use it, and keep a patch kit ready.

Thanks for your interest.