Just got my Tab S2 today. It is a refurb which didn't come with the tool for opening the SD card tray. I've been trying to use a paper clip but no luck. I'm curious as to how much pressure is needed to open the tray, and what kind of mechanism it uses. When inserting the tool is one releasing a spring catch type thing, or are you physically pushing the slot out? any help would be appreciated before I determine that I have to send the thing back.