I printed these on a Monoprice Mini Delta using red Sunlu PLA+. No support.
Designed in OnShape, original files here:
https://cad.onshape.com/documents/5d29dbe53bccc657e9669b68/w/7c59fd665702cc8399846fea/e/026724da1562aab3ecca4bfd?renderMode=0&uiState=66331499f0e036346f4d3a41
The author remixed this model.
One small change - I flattened the hex friction fit on one side so that it would be flat against the bed and not need any support while printing. I added a 45mm mount as well to accommodate my Bed Weld bottle.