I just got a C10C Sheepdog XL. I took it apart for my customary cleaning and re-lubricating, and I was surprised to find the MRBS bearing system was of a uniform color. The balls and the disk they were embedded in appear to be the same color and material. It was so uniform in appearance that I had to look very closely to verify that it was not just one solid piece. What is this material? I’m not inherently against polymer bearings, but I’ve definitely not seen them before.