Doing the same with hydraulic cylinders operating in series and parallel is just as easy. The issues to look out for are:
2. How to easily re-position the cylinders from either parallel to series configuration i.e 180 degrees out of phase or in-phase.
Here is a simple solution and modification HADES made to a CLARK 18T Container forklift. The CLARK forklift carrier needed the fork tynes to have a side shift option as well as the normal extend and retract.