Hi, I would like to build a small hydraulic mobile workshop crane, sturdy lightweight, manageable agile in the maneuvers to be made of steel profiles, if possible instead of the hydraulic piston would I put a mechanical device to raise and lower the arm some ideas?

https://www.liftingsafety.co.uk/prod...crane-293.html
https://www.liftingsafety.co.uk/prod...rane-2937.html

https://www.liftingsafety.co.uk/prod...anes-3011.html

https://www.liftingsafety.co.uk/prod...crane-293.html
https://www.liftingsafety.co.uk/prod...rane-2937.html
https://www.liftingsafety.co.uk/prod...anes-3011.html
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