Thanks Jeff,
the desk that I have is already like some of their offerings, it is like http://www.musiciansfriend.com/srs7/g=rec/product/images/page=1/base_pid=546550

Abacus,
that seems a good idea, I will see about it...yesterday I saw a desk (Jester) at www.IKEA.co.uk that seems promising, it has adjustable height. And if i remember well, a friend of mine has it.

Thanks guys,
Theodore