To me a mock-up of the screw's head would be more than enough but it's your part.
I do not think that you should add more detail to the inside nobody will ever see but rather fix:
https://www.ldraw.org/cgi-bin/ptdetail.c.../u9518.dat
and get the part shipped.
w.
I do not think that you should add more detail to the inside nobody will ever see but rather fix:
https://www.ldraw.org/cgi-bin/ptdetail.c.../u9518.dat
and get the part shipped.
w.
LEGO ergo sum