I printed without supports. The fit is very tight by design. I pressed each plug partially into place and then whacked it with a mallet to seat it fully.
3 sizes. I'm leaving the two lower holes open for now for drainage and venting.
With that plan, each LCA gets:
4x LCA Plug 19
1x LCA Plug 14
2x LCA Plug 11
The author marked this model as their own original creation.