snapdiff on a snapmirror destination volume

TSM supports the snapdiff method on snapmirror destination filers. I plan to put this in place, with TSM version 7.1 client and server, and DOT 8.2
Pete Tanenhaus has advised to periodically backup with the CREATENEWBASE option, to recapture changes in the inclexcl list.

I take it that I will be unable to use the CREATENEWBASE option on the Snapmirror destination filer, as it is readonly.
Instead, should I do a progression incremental without the -snapdiff option ?

Bart