Guys - the sling gets the rock up on the wall close to where it belongs, and in most cases only one chain is trapped. The rock can be rolled off the chain and set. Most of the rocks in the wall were managable by hand though. Our property is a real boneyard - planting a shrub usually results in pile of rocks. I built the sling for the ones I didn't want to roll in the bucket for fear of bagging out the lip. Most of our rocks end up in a pile at the bottom of the drive.
By the way, the hood ornament is from J&P the Harley catalog. It actually belongs on the front fender of an FLH. When I saw it I knew where it had to go. The bottom was ground to match the curve of the hood and 2 high intensity LEDs were installed behind the eyes.
12+" so far and still coming down today near the Cape and some quality tractor time after lunch.
Dave