Build

Build was started during the CEB Press/Power Cube workshop with most of parts cut out by Shayna and Eric?
Finishing with bending steel over a round edge. It turns out that welding on slats perpendicular to the direction of bending allowed the 1/8" steel to be bent into a perfectly round shape using a lever arm and using bolts to do the pulling
Closing lid was added at end
Different motors can be interchanged - coupled via a double-chain coupler with modular motors carrying their own sprocket half
tines are bolt-on, and work up to 10 cu in motors, but bolts got loose on the 45 cu in motor
See 70 steps of build procedure here:

Dry Run

Uses fast rotor, 650 RPM, 5 cu in hydraulic motor driven with 14 GPM hydraulics
Not enough torque once 5 buckets of soil are used
Switched to 10 cu in and finally to 45 cu in, the latter being 15,000 in lb of torque