I am wondering about the effects of angles on a stone knot and a toggle. I did a canyon recently where we rap'ed off a small rock horn. The drop was pretty quick after the anchor so extending the fiddlestick was not really that good of an option. To rig the toggle it would have had to have been tied close to the rock with a the rope at a pretty wide angle...I would estimate at probably 140 degrees or so. That is a big no-no with climbing anchors. Does the same principle apply to rope and stone knots? Instead of a fiddle stick, we rigged a retrievable anchor.