I’ve fragged a Sunkist bounce twice. Both times I cut them into quarters using a fresh utility knife blade. The first time was very successful and the second time was 50% successful due to 2 of them melting away afterwards. I believe the difference was the first time, the mushroom was attached to a frag plug and the second time it was not. If I was to do it again, I would make sure it was attached to something that would stay attached after the cut. It took a few weeks for the new mushrooms to turn round again. A mushroom box with loose ruble/plugs afterwards would help from keeping them from getting blown around.