Broke middle scroll key x230

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i l have a middle scroll key on an x230 that falls out. I actually got a replacement & then broke it when trying to fit it!
Any tips on sourcing another replacement other keys that may be compatible from different models that may be compatible?
Also tips on fitting it if at all possible as i am very ham fisted & couldnt find any instructions on net.
Thanks

[kfzhu1229]

IF you simply cannot get it right, go and get another keyboard if you feel like to do so as the trackpoint buttons are actually attached to the keyboard, NOT the touchpad/palmrest!

[TPFanatic]

You have to pop off the left and right buttons first before doing the middle button.

I too discovered this the hard way.

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Thanks for the replies guys, Cheers TPfan ill bear that in mind if need to do so again. Got another KB for it now a backlit one which is pretty cool.