Some time ago, I had the opportunity to purchase a 90CW. This was one of the earlier CW models with the collet only spindle. On the newer ones like I have now, the spindle is still bored to accept an 8mm watch makers WW or B8 collet but also include the 22mm register and 3 screw holes to attach a faceplate with M14x1 thread to accept the range of Cowells 90ME headstock accessories. As I say, the one shown in this video is the older version and had I used the newer more versatile modern version, my views would be very different: