gs264 is on the same thought as I am. If you have time, and perhaps another hand onsite, you may want to even remove the platen bolts and do a manual resync with no springs, let the pistons completely settle and measure back to the platen hats. Might find one jack has never been hitting that check valve to resync. If the measurements are different, you should be able to use some washers to make up any small differences, think they were 1 1/4 or 1 1/8. This also should help you verify that the jacks are aligned, giving you a shot now at getting a chance to stringing the pistons.
