I will be without a piano for a couple of months
Another thing... You are sure you can not play any other piano that time? And what about theory or mental practice? Or make a 5-year plan, listening, theory etc. You could achieve a lot in some months (assuming that, because you can't practice, you will have some free hours a day). On the other hand, it is also quite painful to think about the piano all the time when not being able to play. Anyway, do SOMETHING, so that you don't go lazy. Then again, of course, I have no idea what could hinder you to play for such a long time...
and how hard was it for you to get back to where you were?