[welcome] to The FOG, Jamie,
First of all, you were most welcome to post here before you purchased any Festools, but I am sure Festool is very glad you are now a fellow owner.
Bummer that your Systainer of Dominoes did not arrive with your Domino 500, but soon that will be made right.
Your CT48 came with a 27mm x 3.5m AS hose, which is necessary for your Domino and future Festool sanders.
My suggestion is that you amend your TS55R back-order to include a 36mm x 3.5m AS hose. My experience and that of many other professionals is that the slightly increased stiffness of the 36mm hose keeps it from hanging up on the guide rails as much as the softer 27mm hose. Also, with the larger hose your dust extraction with the TS55R will improve. I also suggest ordering the accessory plate to cover the opening in the side of the saw, which also improves dust extraction.
One way to get a deal on the 36mm hose is to order one of the cleaning sets which include the 36mm AS hose. With the cleaning set you can stay tidy as you work.
Another tip, when using the Domino, which will not use a 36mm hose, turn the suction to maximum on the CT48. With the Domino 500 the more dust extraction, the better. Same for the TS55R!