clutching at straws hoping someone out there has done it.

I have a Bosch 45-16 hedge trimmer to give its full details.
Model: AHS 50-16
Product No: 3 600 H47 B70
Type: Hedge cutter
with blunt blade/s.

I'm told its dangerous to self sharpen the existing blades so want to buy new set. But don't want to attempt replacement without knowing if other bits can fall off parting the casing.
Thanks