Here is a very quick and easy solution for building custom matrices:
start with an empty matrix (which will become your custom matrix) and load also a factory matrix which holds the amount of players you need. (all or any subdivsion). This factory Matrix is just used as resource and any articulation you need can be copied and pasted to your custom matrix. with cell copy/paste. (right mouseclick on any cell and select copy)
With this workflow you don't have to search through the patch browser and you can built a very complex custom matrix within less than a minute.
best
Herb