I took 2 halves from the half Dodecahedron made by bneedhamia and combined them. It thickened it up enough that it prints with no supports. Awesome job to OP for the design.
My photos show with a brim, although follow up prints showed it wasn't necessary
Amazon Basics PLA
Printed at 50mm/s it took just over 2 hours. Temp was 210. Fan at 90 after the first few layers