Actually I found that I mis-interpreted a statement in the docset about SMB as excluding SAN support in a cDOT. Not true from my experimentation. I used the toolkit to create LUN snapshots (New-SdSnapshot), put snapmirror labels on them (Set-SdSnaphot), learn the ONTAP volume name behind a mapped drive letter (Get-SdStorage), etc ... all in a clustered ONTAP environment. So yes, it seems to do what I originally expected.