All the above and more.
supply a DWG of the geometry and you would get some real answers.
I recommend looking at counterbalance valves mounted directly to cyl ports, (code for lifting around people)
I agree do it hyd both directions
hydroMET
Yes
Sizing hyd pump disp for gasoline internal combustion engine, especially a wisconsin type cane be sensitive.
I have been through all the sticky claculation, but in the end testing is the only way to be sure of the max disp you can turn at the max pressure you need.
I sugggest to find a...
If you are looking for a low pressure proportional control device I would look at Mico brake manufacturer. They do lots with low pressure and relatively good resolution
Mico.com
Daniel Larson
Manufacturing and Fluid Power Instructor