For activities in the lower nose compartment (Fwd pressure bulkhead) the white stabilo cable drum dripshield is often removed. It is mounted with a clamp to the front and two screws (hi-lock type) to the back. If the shield is removed the two screws stay behind in the frame, together with two harex blocks. They are mounted from above therefore it is easy to leave them this way. But because there are activities going on in this tight space it can happen that the screws are pushed up, where they will stay. Now the head of such a screw comes inside the stabilo-drum. The consequence is that if the stabilo wheel is moved by hand, the drum hits that screwhead with damage as a result. If the stabilo movement is done with the electric trimmotor, the damage will be much bigger. The cable drum then has to be replaced. And this could all be prevented if you remove those two screws. So next time remove the dripshield including the mounting screws!