Amorphous Cell limits

Hi All,

I'm currenly in the process of trying to create some large(ish) amorphous polymer cells. The largest I have managed so far is 10 chains of 100 monomer length.  Ideally I'd like to create larger systems, but I'm having issues....

I was wondering what experiences other people have had of creating large systems - what is the largest anyone has managed so far?

cheers,

Chris.