footplate for sunshade

I got me one of those cheap sunshades to take it with me when I go to the swimming pool.
There comes a footplate with it which is intended to help sticking the pointed tip into the ground.
Actually this plastic is that weak, the thread just gets ripped out soon.

I made one with a longer thread and even some kind of additional "bushing" for better distribution of force. 3 shells and 50% infill will do.
Dimensions of the tip on my shade are roughly 12mm dia and pitch 1,65.
Although it is a