When it comes to precision-crafted shell sets, you have a choice! Expanded vs unexpanded. Some magicians swear by one, some swear by the other, and some use each in a different context. Each has its own strengths and its own limitations.
Expanded Shell Sets use an expanded shell along with ungaffed inner coins which are hand-picked for an exact size-match as well as for overall appearance matching. With expanded shells, it is possible (with some searching) to find other ungaffed, matching fits. An expanded shell might also fit your other normal-sized gaffs, like your flipper coin.