One challenge for Swift designers is they did not design the original manifold as well as needed, so some of their iterations were to narrow it, including getting away from the side hose connection. (That’s a cost of not doing the design well enough the first time.)
I found it too wide for sleeping on my side (probably was the II version, the later LT is lower profile and the later FX much lower profile, necessitating different pillows assembly – so they’ve had four iterations, some not surprising for a new concept.
Different desires for hose routing (over head versus on chest) complicate life though some designs like the Swift II and LT handle both. (Maybe with a kludge – I put a fabric loop on some headgear such as what I use for my F&P 431, to hold the hose upward, its connection swivels fully so I can do that – some designs do not.)
(I abandoned the Swift as my nose passages were not clear enough often enough – poor choice by the sleep doctor’s people, I needed a mask not nostril interface. After achieving clear passages through a sinus/nose operation I stumbled through several other nostril interfaces before CPAPMan pointed me to his CONJO headgear for the ADAMS pillows-manifold system – with some additional modifications to all parts that combination works quite well because headgear is stable and pillows are of proper size and geometry. The FF is only backup.)
And for interchangeability of parts, many four-strap headgear variants for conventional nose and face masks will fit other models and brands. I use the Respironics Mesh SoftCap as stable headgear for other brands (doesn’t work as well with nose mask as with FF of course because of strap angle to higher attach points).