Updating mmat's at a staircase

[TimSimser]

I got a question about updating the mmat's at a staircase, I cloned a modular stairs, and there are 6 object data's to be updated, but which of those do I have to update the mmat's, the six object data's are:
Stair Modular - Quaint - No Railings - End
Portal A
Portal
Hi Curtout
Hi Stub
Bridge

Or should I just update none of the mmat's?

[Numenor]

W7hen you clone a modular stairs, there are no MMATs in the clone, because modular stairs are not recolourable. Therefore, any option or action involving the MMATs is just useless. Just registe7r a new GUID for each of the six OBJD, and click Commit every time, ignoring the MMAT options.