Getting ready to begin assembly of a few CTI motors that will be using Aerotech hardware. I read over the instruction for both CTI and Aerotech, and needless to say, they are a bit confusing. When using the RAS system with spacers, there is a constant reference to the insulating disk and forward seal disk. Are both to be used? Test fitting would indicate that the insulating disk (plastic) would not be used, since the floating forward closure and the seal disk seem to fit together very well. Does this mean that the insulator disk is just discarded? Not really sure how this all goes together.