Connectors and End Pieces
thingiverse
This is a collection of parts. Connectors (2 back to back) go into slots and connect walls and/or columns. No glue required, but the two rails may be glued back to back End pieces go into the same slots and close them for aesthetic purposes or increase footprint for stability. The number is the length in inches. 4 or less covers one floor, 8 covers two.
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