The little nubs on the caps but I felt absolutely disturbing.
Where you can create but with finer sandpaper (160er-200) and nem lighter remedy.
Have put the caps first on NEN thick pin (take something where they fit on just exactly) and then just runtergeschmirgelt the knobs. Then again heat the caps with NEM lighter and the remaining unevenness press smooth (hot Caution: D).
Now they feel in my opinion really good at and 1.50 EUR to do in no way something wrong.
With pimples they get from me vll 3 stars, but this is certainly a matter of taste.