A narrow "V" type pattern in the center, with two wings operating on an LCD of 7 ru.
A sunple one operating quite accurately on an LCD of 6.6 ru.
Here we use an LCD of 6 ru.
With an LCD of approximately 4 ru, we find the +X axis is along the ray for #100, and the +Y axis along the ray for #71. There is one "V" type cluster hugging the Y axis and a second narrower V involving #93 and #87.
There are two different patterns on this chart: which are not directly related. The first is the impressive and accurate straight line relation of #76 at 15.8 ru doubling to 31.5 ru at #50. The second cluster, with an LCD of 8.5 ru, has a +X axis along #99 and a +Y axis near #70, with a "V" type spray along the Y axis. The angles between the "V" spray rays look visually symmetrical.
This sample operates on an LCD of 5.5 ru. The hardcore of this pattern is the balancing of #84 (5.6 ru) opposite to #96 (5.5 ru); and the balancing of #80 (11 ru) opposite to #91 (10.8 ru)--all close in to the center. Visual inspection shows #96, #82,#84, #57, and #44 clustering into one narrow beam, while #80,#82,#94,#91,#87, #90, and #63 all clustering into another beam (just not so narrow).
Another straight-forward example with an LCD of 13 ru.
A two-axis formation with an LCD of 12 ru.
With an LCD of 7 ru, we get two significant rings: one at 14 ru, and the other one at 42 ru.
A rake with an LCD of 5.6 ru.