Hi guys, newbie here. I bought my subox mini second-hand but after 3 days the tactile switch broke up into pieces. After dissambling, I noticed that the subox has been altered as there are leftover glue on the switch! Can i buy any regular tactile switch? If yes, what size? By the way, I never meddled with electronics before but willing to learn. There are no professionals willing to repair this one so I decided to try it myself. Suggestions/advice?