Ive seen reference to letting the spring pressure off with the out of the box Magma Star lube sizer . "To save the seals" Does the air cylinder option need to be turned off after using . I really don't see the issue , as soon as the tool cools off the lube hardens and there's still the spring compressed but no pressure on the tool with the out of the box Star sizer. . BTW what seals are there . I did not think the lube pump piston had any. I understand that the air cylinder option from Magma or homemade air cylinders use very little air and keeps a air bubble under pressure upon the lube so no adjustments are needed for extended use other then adding more lube when needed and the air cylinder holds more lube then the "stock" out of the box sizer