Separate SubD at hard crease?

How would I go about detaching the piece on the left from the main body at that hard crease I’ve made (shown in Pink)

FYI - Yellow and Green is for a different topic I posted about Squaring off Edges & Faces

Thx!

rhino 7 SubD question_200227|690x467

currently I think the fastest way is:

! _Copy _Pause _InPlace _Delete (selecting the faces you want to separate)

Another good example of why we need Split at selected edges for SubD.

Highlight what you want separated and call _ExtractSrf

Thx. And wholly agree with @gustojunk. I don’t want to have to go on a hunt for every everything I want separated. Just Split at Edges.

I’ve filed this in the past as https://mcneel.myjetbrains.com/youtrack/issue/RH-54108 but also just filed another hopefully easier approach as https://mcneel.myjetbrains.com/youtrack/issue/RH-58755