Removable Vagina For Sex Doll

RacyMe doll comes with a fixed vagina. This vid show the insert and removing of the optional vagina they said they could add for $40. Please tell me how f'd up this is? 1. Stretches and snaps out like a rubber band 2.Looks like they are stuffing it into the 'fixed' opening? Had to grease it up to get it in there. Is that typical of inserts? 3.Insert looks unappealing; what's up with that slit opening? Is there any texture inside? 4. Once in place, wouldn't the thing be tighter than dick's hat band?