These stamps are easy to print. They are designed to be as easy to grip as possible, use minimal filament, and be easy to store.
Below is a model you can download from another author to help your stamps hold better, using just one additional model.
The author remixed this model.
This model is not a remix! I'm only listing it as a remix so that anyone can download it from the original author and use it to improve the stamp attachment. (: