On a Z-Rig/3:1/Trucker's (i beleive equivalent terms); i too use a butterfly, which is more proper (i beleive) use as the knot is loaded from both ends, not just one.
In tieing down for loading/hauling etc.; i'll Z-rig with base spread (line forms triangle from butterfly to anchors)if i can/ losing some 3:1 efficiency; and impact tight with massive body weight. Then take the tail of the line and wrap a few times around the spread legs of line (perpendicular to the tightening of the rig); then i use the MA of those turns (around spread legs) to leverage bend/sweat in more tension, then lock off that tension. Many times better IMLHO.
In moving a motorcycle etc.; i'll use that to compress a shock on one side of the front fork, by tightening on one side of the handlebar sharply and purposefully; then lock off. Then do same to opposite side to straighten bike back up straight. the tehsion of the lines fighting the tension in shocks is very helpfull. for the really paraniod, bring line across under handle bars, use wraps around both rigs (each wrap giving more MA), and bend your Zrigs towards each other (make sure doesnt press on headlight etc.).
Force is force, in the field or at the garage; leverage bending a tightend line is very efficient, intense leveraging, greater than 3:1 but over a shorter run. The 3:1 though can induce a tighter line, to get more from the leveraging for helpfull support in play or werk; same pattern to practice in different forums.
i also find that bending a tightend line sharply just as a rigged limb starts to hinge to steer horizontally over obstachles below, gives intense support and forces high strength in the hinge(if you catch it with the leveraged force, just as limb starts to hinge, that first flexxing induceing the strength of the hinge made stronger by more pressure at that specific point in time), for it to carry that stronger support through the rest of it's sweep on the hinge. Very power-full strategy for me, backed up by the numbers of leverageing.
Likewise, tightening a Zrig for lift/line pretightening, can be tweaked sharply if after tightening you anchor the tensioned leg of pull, then bend/ impact the line leveraged, especially by falling backwards with impacting bodyweight, then feeding the gained purchase on the line out the anchor to the standing end for sweating in that last and high leverage tension. Just using the 3:1 as a preset for tightening the line, to gain more leveraged force from the tightened line at bending as your real target strategy for quick maximum. As the bend of the line is your leveraged arc, the pretightening the force you feed into that leveraged psoition, and the pull at the anchor/load points the output from the leverage machine (of the bent line) for your efforts. A little blurry at first, as in seeing the 2:1 MA in a DdRT and blurry for the same reason. The patterns are harder to see as points in a system become multipurpose, because of their strategic positioning; especially as they compound on thems-elves in doing so; but catching that part of the curve on your side can be very helpfull!
Orrrrrrrrrrrrr something like that!
-KC
