Greetings .... I am thinking about upgrading my thinkpad t400 to a t420 or wait for the output of the t430 or possibly increase the screen size to t530 ... the matter is that I have a 2504 minidock Type with my t400 ... this minidock is compatible with the series t420? Of course that we don't know if with the T- #30 ... has not come out ... of course .... but if someone can clarify this doubt ....... Thank you very much.