I have been unable to find an appropriate sized spacer with insets for an o-ring on the top and bottom searching Google so I decided to consider 3D printing the spacers and using off the shelf o-rings.

I am concerned that the printer might have trouble with the inset on the bottom of the spacer. I was hoping you guys have some experience regarding this.

The printer I was thinking of buying to make a bunch of these small parts in ABS plastic is the Creality Ender 3 3D.

Any advice you guys have would be more than appreciated, thank you

Bob