[KenWittlief]

there would be no reason to use this approach to pull up to the bar - to do that the cylinder can extend all the way at once - no need for mulipositioning

this proposed idea is more for an arm to get the 2X ball - you could infinately adjust the position of the arm, by slowing leaking the 'vent' valve - and once you close it, it should stay where you left it.