We fished out a CMP rim that had a blow out a few years ago and was left outside with Mother Nature.
By the way the tool does come with pictures and instructions. They DO NOT recommend using a air impact gun but a air ratchet gun may be used. The difference is the air ratchet only get up to 90 foot pounds and the typical air impact gun in 1/2 in. size gets about 450 pound.... the 3/4 we have does 900.
The air ratchet is useless unless you are just taking up the slack in the bolts. We used a HAND ratshitt with an 18 in. handle and Grant who did all the heavy work did admit that it took some muscle power.
The tool works best with two people since you have to tap the base of the tool for the wedge to fit under the rim's edge.....at the same timeas you lightly tap you take up the slack on the claw that pulls the foot in deeper.
So tap tap thighten tap tap tighten....... don't go wild you risk cutting into the side wall ( which we did not care as it was toast) until the free space between the throat of the tool and the edge of the rim is closer..... we went to far and chipped a corner of the foot...... not a big deal but should be avoided.... we simply unscrewed the claw bolt a half turn and went on.