This is an adapter to put your standard full-size 6bolt car wheel onto your g27. The original bolts will bolt the base onto the g27. You will need to supply an M10 bolt and nut (washer also suggested) along with m5 nuts and bolts to bolt your wheel to adapter plate.
100% infill suggested due strength required for the leverage you'll be applying .
Supports are not required but suggested for some of the bolt holes.