Hi! To perform step 8 in Inventor you can follow the next steps.
Open the "Rectangular Pattern" tool
clic on "Pattern a solid"
select "Create new bodies"
Then select a face to choose the direction in which bodies will be replicated.
Enter the number of bodies (6) and the Spacing (In my case, the spacing is the width of the base body = 95 mm).
To rotate the bodies clic on "Move bodies" tool and then select "Rotate about line" (ignore the Free drag)
Select the body (#2 in this case) and enter the Angle (240 deg)
to select the "Rotate axis" clic on the face just like the picture.
Clic Apply and select another body.
Finally, open the "Combine" tool, select the base body and the auxiliar parts (mark "keep auxiliary part").