hi guys, i'm new here.

i'm emiliano from rome and i recently started to follow IKEA hackers blog to take inspiration for my project. i started from this post:
IKEA Hackers: Lack Rack & Expedit Desktop
i want to put an expedit 79cm x 149cm (horizontaly) right after the desk, to get a simple TV unit and PC desk combo.
if you look at this picture, near the mouse to the right, you can notice that the desk and the expedit unit
are not at the same height:

it's a well known problem, so probably you already know how to fix it and i need your help. i'm thinking about some kind of feet to put under the desk, but maybe there's another
(simpler) solution.
please let me know, thanks.