Suggestion for on-topic posting, related to keyboard size :
This whole key size discussion is very interesting, but only peripherally related to the Sequential Fourm. It quite legitimately deserves its own thread – something like Keyboard Sizes.
To add to this there is also Narrow Keys or Reduced Size Keys standards ( multiple standards ) that i discuss in this post as well as this post. These standards are being used with acoustic pianos, and the new piano keyboard discussed in those posts.
ADDED : I made a new thread, Keyboard Sizes