So I got a Minidock Series 3 Plus, despite them being labeled as incompatible with the x220 tablet (compatible with the nontablet though) on the website. Got it in the mail today, the only thing that prevents it from fitting is the rubber battery catch on the right hand side and the sliding corner catch on the left. After an hour and a bunch of struggling with plastic, I finally removed the corner catch and the rubber thingy (nothing was broken or cracked, this was all finding the right screws to remove and etc). It DOCKS! YAY! Although the eSata port doesn't seem to function.. might be a driver issue as the x220t was never meant to go in this dock and doesn't have an esata port of its own.. If anyone is interested I could post pictures and etc.