I would study the chart of any k-boom, but wallboard cranes are just different animals.
Doesnt mean I ain't curious about them, but missing 1 knuckle is a big deficiency.
I know this is not your question. And I'm not going to steer this thread because I know your general knowledge of cranes is better than mine.
All I'm saying don't under estimate the value of 1 more knuckle up close to get under overhead obstacles (wires) or even to get over them.
The angles are also super, super important up high to position the boom to get the grapple into a canopy.
Sometimes part of your boom is mere inches from contacting a limb when going in for a pick. It is going to deflect some with the weight of the pic so you better position it to avoid contact. One more knuckle down low helps.