Since the CT's accept standard shop-vac hoses, for which a fair selection of adapters is readily available, I find it worthwhile to own a couple to work with odd (non festool) tools.
Jet offers an assortment of adapters. A 4 inch sleeve and a 4 inch to 2 1/2 reducer should give you what you want. That is what I have on my jointer while I am saving and planning for a cyclone.