You can operate those cylinders as double acting cylinders by attaching pressure to the mounted ends of the cylinders and return oil at the extending end. This will keep you from having to use a reservoir. This is what I do.
Does your '45 'B' have PowR-Trol or PowR-Lift ? PowR-Trol already accomodates external cylinder hook-up while some mods will need to be made to a PowR-Lift to use a remote cylinder(s).
70D // 855