I recently bought a Cybex Solution booster seat for DS. Was a little impatient while trying to make it up 
and put the drawer (where the manual is supposed to go) in place only to find in the manual that you can't attach the backrest with the drawer in place, and the drawer won't come out 
Is there a knack to it? I did notice before I stupidly shoved it in that it was ridged on the top so have tried rocking it up and down but it makes no difference.
You can't even use the seat without the backrest - so I have a totally useless seat which I can't use. Argh! We probably won't use the car until Saturday, so I have a bit of time. Any ideas?