Logical Data Base CMC

Hello

Is it possible to modify Logical Data Base CMC?   We need additional data from MARA, MARC and Classifications (Color, Color2, etc.) for Parent to be part of LDB - CMC.

This is what I did in test but not sure it was the best approach?  I created a copy of CMC called it ZCMC and created a copy of MASTB called ZMASTB.  I added the additional fields I needed to ZMASTB.  I modified the code in ZCMC to join MARA & MARC to MAST table and I created another SELECT to get classifications.  Can you advise if there is a better solution? 

Thanks

Gary