mozart concerto 467 and 595

[pianonut]

ok. i finally got it right!  HELP. I am a student who needs some insight into these two concertos.  I've looked on openmozart.net (forum), but was hoping to talk to any perfomers who have performed one or the other of these concertos (or both) to ask some questions.  Yes, i have questions about cadenzas, about who played these (understand that mozart did write cadenza in for 595 but not 467)  The correspondence of mozart sheds little light, but i wonder if he simply did not write it in because he was performing (and didn't need it written in).  Do you know who mozart (besides himself) had play these concertos.  Did he favor one of his students?

[pianonut]

ok, i'm narrowing my thesis down to the improvisatory nature of mozart's piano concerto cadenza k.467 vs. the included cadenza of concerto 595.  You don't have to have played these.  Any insight as to where i can find material that is reliable and source concious about classical cadenzas and improvising (especially in relation to the mozart 467).