Diplaying matrix with drill down (toggle visibility) enabled for 4 row groups

Hello,

I have a matrix in SSRS 2012 with 4 row groups representing a product hierarchy.   Product Sub Group, Product, Sub Product and Account Number are the levels of the hierarchy.  I have enabled drill down (toggle item visibility) on the first 3 of these levels. 

This works great, but my matrix is very wide when it is first rendered.  Ideally I want my matrix to expand horizontally as I expand/drill down into each grouping.  So when the report is first rendered, and 3 of the groups are invisible, the matrix will be thin.  Is this possible?

Thanks,

Gabe