Mr. Sawyer Rob, what is an 8-way? Not questioning, just keenly interested.
My understanding is a 6-way typically allows for a combination of:
Angle - blade swings around a center vertical axis to allow pushing or pulling, such as commonly used to plow snow towards a ditch...
Tilt - blade edge can be rotated on a horizontal axis, so the the blade can be tilted up or down such as for cleaning out ditches or adjusting crown on a road...
Offset - blade can be angled at the 3PH end, to offset the blade to the left or right behind the tractor...
The only other thing I can think of is angle of attack, such as adjusting the length of the top link to make the blade edge to cut more or less aggressive, (although that's not really inherent to the blade).
What other adjustment is on an 8-way blade?