I solved an issue in my CoolerMaster MastBox Q300L with GPU sag and a support pin that didnt quite reach far enough to support the card.

This is a ~20mm extension to the threaded Amazon GPU support pin.

Link to threaded GPU support: https://www.amazon.com/dp/B0BPGJCLYR?psc=1

This design can also be scaled accordingly for any circular GPU support pin

Bambulabs

Bambu P1S

No

No

0.2 mm

5-15%

print with the hole facing upwards(+Z direction) for best quality