[LAU] 'Modular' midi controller for keyboard

[rosea.grammostola]

Hi,

I'm looking for something which I can use together with my 88keys 
masterkeyb without knobs. It would be nice if it's small and light 
enough to put on my keyboard itself. Something like the evolution uc-16, 
but it would be nice if I could route my midi masterkeybd via the 
controller to the computer (midi in / midi out / midi thru (?).

I like to control stuff like setBfree and some effects in Non-Mixer 
probably.

Thanks in advance,
\r