hey there,
here is my small reduced design bucket. my focus to design that little “cup” was to reduce the objekt to the minimum, stay near to cd of the printer, easy use and complete cover for the hole.
-magnetic fix
-self positioning
-complete cover
-dimensions: 36x26x231mm
-print time in 0,2 pla: c.a. 1h35
-2x neodym magnets in 20x2mm or maybe smaller
i hope it can be usefull fpor others, too and let some comment if you want!