@adrian2301 I would say that it’s not only a question of saving time which is especially important for people who’re doing digital modeling commercially but also a question of developping skills and of mastering a challenge. Of course, I could say that for example my rear axle is a rather hidden part and that most areas will never be seen at from a short distance in the final video but I wanted to model it as realistic as I can and learn what I needed to achieve this goal.
When it comes to modeling a screw head with a cross shape, I think, it makes a difference whether the cross ends already before it can reach the head’s rim or whether it hits the rim. My problem was that I wanted to model a cross that uses the full diameter of the head so that the holding edges for the subsurf modeling ran into the round rim. I had no margin where I could somehow redirect these holding edges.