I tried docking my X220T to my W520 Series 3 Plus Dock today, didn't work cause the stupid alignment blocker was in the way.
So, I tried removing the blocker, couldn't open it up, cause one of the screws was stripped.
So, in a fit of rage, I used my ultra hitech method of Modding, reserved only for the most difficult of mods.
I ripped the blocker preventing the X220T from attaching off with brute force.
Problem solved, it works like a charm, saved myself 150 bucks on a ultrabase, now I have a series 3 dock that supports all the laptops with no blocker.
This definitely goes up there with my shimmying the connector key on a 170w AC to fit into an 135w or 90w dock mod.
So, if anyone has an series 3 dock that they want to use for the unsupported X220T just rip the blocker off, its pretty flimsy so comes off with one simple jerk. No tools necessary.
I've made nice photo guide. Combining my old W520 mod.
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