When I was printing a big object the filament reel jumped out of the
holder and the print stopped. The filament was near to finish, the reel
was too light to hold the feeder force.

Here is my solution to the problem.

Print needs supports on both pieces.

You have to be careful when you clean the supports, you have to leave
it tight enough to keep it closed but not too much so you can open and
close it with not much effort.

Units in Centimetres.

You can see the assembly and use in this video: