I also used to give the bellows a yearly treatment with leather oil or shoecream but mostly just the leather parts which got the most strain and wear - that is the outer corners and edges and the deep folds. When doing the later it is advisable to have one finger inside the bellows meeting the one from outside...or doing it with a brush and finishing lightly with a cloth afterwards.

Again, I can impossibly understand that "Jim and many others like the clack of th buttons"...since it IS after all a symptom that the buttons are not fit properly. You don't expect any of that to be present with a new instrument or one in good condition...
Of course if you get it with an old instrument that you for orthodox reasons do not wish to change by reconditioning it you may believe that you perform on "an original instrument" which of course is a delution since originally the instrument likely was NOT in that shape....