power-trol

Tye is partially correct. The cylinders will not use the same amount of fluid extending and retracting. When extending, the entire volume of the cylinder will need to be filled. However, while you are forcing fluid out of the shaft end at the same time, it is not the same amount since the shaft volume is subtracted from the bore volume. Basically there is less fluid capacity in the rod end than in the open (Bore) end. I am not familiar with the powr-trol capacity. You will need to find out the capacity and compare it to the volume of all of the cylinders at full extention minus the volume of the cylinders at full retraction. When in doubt, err on the side of caution and put a reservoir on.

Good luck,
Dave