This is my remixed version of Dabtec's spring compress gadget

Bambu P1P

Doesn't Matter

Yes

0.2

15% +

Print it flat as the photos, not upright, it does need supports

Took the original, thought it used a lot of material, so first reduced infill, then found that the top was too awkward for my fingers/strength so rounded on end to allow the main cap handle to slide over. The I rounded the bits at the bottom that hold the gadget to the springy bit of the main cap and widened them so they fit nicely and the gadget rolls into place. It also rolls out easily too.