I just purchased a airport express to upgrade my wireless network at home. I was using my 1st generation airport express till today. I still want to use the airport express for airplay and maybe connect my printer for wireless printing. My question is what is best way to achieve this? Join or extend? Is there any disadvantage in using the older express with my new extreme? Will I lose any performance by using the older 1st gen express with the newer extreme? I will appreciate any information on the topic. Thank you.