I was able to figure out the knurled portion of the handle is threaded into the larger, top portion of the handle where the3 bearing is mounted with a normal RH thread. I made two blocks of wood, one with a 1" hole and one with a 7/8" hole and both with slots to allow for compression of the wood. After applying these pieces of wood to the two parts of the Mahi with clamps, the pieces were easy to unscrew without marring the Mahi. It was then a simple matter to replace the bearing and remount the palm handle portion and screw this subassembly back onto the main body of the screw using Loctite on both.