thingibox's Universal laptop stand with hooks

I like thingibox's universal laptop stand and use it the whole time. It saves space on my desk and keeps my notebook display at the same height as my desktop monitors.
But i had some issues tilting the display: Every small pressure on the display makes the notebook slide out of the stand. That is because of the sharp angle i am keeping the notebook in (take a look: http://www.thingiverse.com/make:80603).
The hooks should resolve this problem.
Please take a look at thingibox's object for in