Final design leaves the CS104 the same length as the Infinity spacer, as far down the CZSA as it will go, secured with BSC-44 countersunk rivets at the rear above the locating hole, and at the indented base, 120 and 240 degrees from the central slot. CS104 and the CZSA have slots oogered into them to allow the cable bundle to exit the grip.
Rather than some sort of boot I had planned to hide the stick pivot I now intend a simple slotted trim like I saw on a lovely Longez at Oshkosh.