This is a more robust version of the original model. I thought I'd draw it following some suggestions/requests. I increased the thickness of the walls by 0.40mm and to limit the increase in weight I shortened the fillet by half a turn. However, the cover weighs a little more (there are about 50g of extra material), so choose the one that is most suitable for you.
I also wanted to warn you that the greater rigidity, together with any printing imperfections, could cause greater friction between the two parts during unscrewing, in this case I recommend adding a couple of sprays of silicone grease on the thread, you will see that everything it will flow perfectly again. I hope this new version is useful to someone.
Happy printing everyone!

30/12/2023

Among the files at your disposal I have added the high version of the male part for spools with a thickness of up to 75mm. It is perfectly compatible with the previous version.
The file is called "STRONG_male_spool_cover_tall_version.STL".