The Sum is designed to be perpendicular the body/guide rope when feeding slack. Any variation that involves you feeding slack with the Sum not perpendicular to your body is misusing the device. Just don't do it!caribe wrote:Gripping the Sum and holding the Sum down appears to be the problem. Light grip might become death grip for the 0.75 sec that it takes to deck someone.geckodru wrote:Option 1. Lightly grip the Sum between the pinky and palm of your break hand.
-If this grip also controls the directionality of the device and if the autoblock depends on device directionality, does not this grip also possibly lead to a crippled device?
As for the light grip, if a quick upward tug of the guide rope doesn't pull the device out of your hand, you need to adjust how you're feeding slack. For me, with a 9" hand span, only my pinky & palm touch the Sum when feeding slack. For my partner, with her 7" hand span, she has a slightly different technique that does involve her ring finger.
Your strongest fingers remain off the device; instead always wrapped in break position around the rope. If the device is perpendicular, it will be tugged upward and out of your grip. If you hold the device down, you are creating a straight !-pass for the rope to flow through.
Let me repeat myself:
Any variation that involves you feeding slack with the Sum not perpendicular to your body is misusing the device. Just don't do it!