print the step flat on its back so the layer lines run top to bottom when its mounted
two adapters are included V2 will save plastic and time and is the one i printed and used.
i printed the step and adapter in Petg.
the bushing was printed in ABS to reduce friction between parts.
the bolts used were 3/8-16 x 1-1/4 flange bolts
If you choose to print this without using abs for the bushings you can merge the step and bushing in cura and print them at the same time using the plastic you pick.
the "NO STEP" is a sticker my wife made on her cricut sorry that file is not included :(