about maximum capacity they said it is 2000 units http://phx.corporate-ir.net/phoenix.zhtml?c=120708&p=irol-faq#37205 (see bullet 12) now they say it is 4000 units http://phx.corporate-ir.net/External.File?item=UGFyZW50SUQ9NDYxNzR8Q2hpbGRJRD0tMXxUeXBlPTM=&t=1 this should imply business is growing at a fast pace