Web Intelligence 4.0 - Edit Merged Dimensions wihtout using Unmerge

I am buiding a whole reporting package in WEBI 4.0 and I've run into an issue. I have several existing merged dimensions in the report (e.g. Month, Year, etc) I just recently added several new queries (from different universes) and would like to add the dimensions that came over to the existing merged dimensions. However, I am unable to do this unless I unmerge the existing merged dimension and then re-merge all the dimension members again. As soon as I unmerge though, many of my reports are completely messed up and would have to be rebuilt.

Is there a way to add new dimensions members to an existing merged dimension without having to unmerge first?

Thank you so much in advance!

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