A pentagon can get unglued after a collision. You can easily repair following the instructions below.
- Loctite 435 (You can purchase here)
- Isopropanol alcohol (IPA)
- Sharp tool such as xacto knife or a utility knife
Clean with Isopropanol the end of the carbon rod and remove if necessary all glue residue with the utility knife.
Clean with a drop of IPA the hole of the plastic part and remove glue residue with the sharp tweezers.
Put a drop of Loctite 435 in the hole of the plastic parts and insert the carbon rod to the end.
Keep some pressure between both parts for 30s.
Verify if the gluing is good by applying some tractive force.
Wait 15min before applying any stress to the pentagon.