https://player.vimeo.com/video/752063535?h=756f25bf03&badge=0&autopause=0&player_id=0&app_id=58479
The Weight setting alters the influence each constraint type provides to the overall, global solution.
Here it relates to the custom connections.
If you are only using one layer, this can be left at the default, 100%.
If you are combining different constraints in several layers, you could reduce this weight to lessen the effects of the connections and blend in other layers.
This is a limit on the number of connections each particle can make.
Note: Increasing this limit can result in longer simulation times.
The distance between particles must be less than this value for a connection to be made.
This is the stiffness when the link (the connecting spring) is compressed.
nxConstraints_Custom_Compression.mp4
Animation showing the effect of a Compression value of 0 (zero) % on the left and 100% on the right.