Hi, I was wondering if anyone has had any experience with the third party power adapters from asia listed on ebay and amazon? ex. http://www.amazon.ca/gp/product/B00SGW6VOI/ Are these safe to use with the SP3? Is there anything in the power specs I need to be extra careful in observing so I don't risk damaging my unit? Can someone please recommend some inexpensive ones that are safe and work?