Summary

A few times my house has come loose due to the tube bending in front of the coupling so that the tube is burdened during printing.
For that I made a filler stick that the tube stays right in the coupling. After I installed this, the problem was solved. print the filling piece with a height of 0.10 high so that it becomes a strong whole and after printing glue the 2 parts together with PVC glue. you can also use a sukje filement to secure.

Good luck

JP Art