I got a friend of mine to buy a C machine when they were on sale last year and so, I have had a chance to play with a Carvetight and have started to make him a dust shoe. The machine is awaiting a part and so the dust shoe prototype is yet untested. There are some differences from the dust cap I have been using. The dust shoe is a low profile dust cap. This low profile is required as the diameter of the CT with allen and washers is too large to fit into a cap. I have made a stationary bit plate which is not a problem except for 14" plus wide carving. This greatly reduces the number of parts. The bit plate could be made to fold up for those wide carvings. Even though the shoe does fit under the standard bit plate, the standard bit plate cannot swing into position without hitting the bulge of the out pipe. There are other prolems yet to be solved. For example, most of the classial bits will not fit through the hole.
Anyway, here it is so far. I will post a video when I get the machine fixed.