Originally printed in a generic flexible filament from Flashforge with:
Some elephant footing occurred, plus some stringing, and it welded itself to the build platform, so adjust your temperatures and speeds to suit your printer.
Printed with the top on the platform so that no support material needs to be used on the very small overhang between the countersink and screw holes.
Designed to fit a M3 screw from the recessed bottom.
This model uses a 3.6mm screw hole to accommodate the Adventurer 3's inaccuracies (by accounting for the 4mm nozzle diameter).
The author hasn't provided the model origin yet.