Tinkering with portals

the knobs have a M4 thread. if printed in one piece with a color print, it might be possible to glue it on something. But i would recommend using a M4 bolt.

Printing

layer height 0.20mm

infill 20% grid 

perimeters 3

The Wrench G-code is a sequential print. (To minimize travel and thus stringing)

(Print Settings > Output options > Complete individual objects) 

Wrench2 has a bridge that has to be removed or by using Wrench2 without bridge you can add support instead of a bridge.

Needs Support

Doesn't need support

Alternatively you can also print it with a color change but you can't use sequential printing so you'll still have to print twice if you want two different colored portals.