Buying more than 1 of the same PO's?

So I want really comfortable plugging and unplugging my new favorite gadgets so I bought extras. It’s nice to have an extra set to mess around on the couch with or whatever. I felt like if I kept the one set in my studio I wouldn’t worry about the little jack shorting out.
Also for 30 bucks this is a great mixer
http://www.amazon.com/dp/B0009XH4HU/ref=sr_ph?ie=UTF8&qid=1431876374&sr=1&keywords=mini+mixer
I can plug all 3 PO’s plus my Korg Volca sampler for a cool live set. You
could even go out of the main mix into
Octatrack for some extra mangling.