I received a request to create a replacement cap for the QIDI Plus4 printer filament holder. This seems to work. I'm using it now to print a second one.
I'm printing in generic ABS with a 15% grid in infill. I added a 5mm inside & outside brim to ensure adhesion.
Thank you to @Coffee_2705750 for the suggestion!
Source: https://www.tinkercad.com/things/aqcNo4Rmpa0-qidi-plus4-filament-holder-cap
QIDI has their own cap model available from this page https://wiki.qidi3d.com/en/X-Plus4/Printable-Components
The author marked this model as their own original creation.