Some trade-offs in the balance of KISS.krab vs. captive strategies:
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Usually if sling just in empty krab, is free ranging;
>>and if either leg 'kicks' into/by krab gate >> sling obliges,'disarms'/falls off
>>while sling in krab sling legs automatically adjust to even at different angles of pull against load.
>>and also rotate for more even wear
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Captive bar /anything:
If either leg high steps in past gate
>>sling stays on, BUT can shear off of krab at high load when would not have before !!!
>>some kind of removable or slip behind captive bar, hairpin, leather strap etc.
Without any hard stop, can allow free rotation of wear, even tension legs at angle etc.
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Any kind of knot or other STOP for this position:
Still allows a high step/kick thru gate of 1 leg to weakness w/o flagging or fall off!
>>then also doesn't allow free rotation, rotation to more even wear
>>and at angle of pull, both legs NOT pulled evenly, so are mainly relying on 1 leg of sling most days.