Creating a network polymer in Material Studio

Hi All,

I am a new user of material studio. I have been trying to make a network polymer consisting a silocon and aluminum tetrahedra crosslinked and creating a network polymer. I tried the 'Build polymer' option but it only makes the polymer in one direction. For example I end up making something like this:

                        (-O-Si-O-Al-O-Si-O-Al- )


but I really want to make something like this:

                              |        |      |       |

                         -O-Si-O-Al-O-Si-O-Al- 

                              |        |      |       |

                  (          O       O    O     O           )

                              |         |     |       |

                             -Al-   -Si-  -Al-  - Si -

                              |         |      |       |

Is there any way to build this in Material Studio? Any help is much appreciated. Regards,

Rafat