The Helping hands Base is meant for use with Loc-Line style 1/4 National Pipe Thread flexible coolant tubes and alligator clips. The tubes are available cheaply on AliExpress.com https://www.aliexpress.com/item/Mayitr-6pcs-lot-Light-Plastic-Flexible-Oil-Coolant-Hose-1-4-Round-Nozzle-Water-Oil-Corrosion/32812608802.html
No supports or rafts required. Any precision better than 0.2mm should be fine.
The author hasn't provided the model origin yet.