First let me say, clamshell ops is WAY more prone to trouble than dragline.
Here are two pics with the top bracket on and rigged on the Menck. I loaded it for a crane capacity/balance test, I did NOT scoop that much sand with the crane.
I'm gona have to re rig and skip one pulley, cause my scale and length of closing rope exceeds the available hoist distance and the shackle hit the boom tip before I get the bucket raised to a reasonable height.
Also, need to make a mid boom pulley for the calming line and counterweight.
Jim