After giving all the obvious moving internals a heavy bath in grease, we carefully lined up all seven little pistons in their holes and dabbed another 2 to 3 ounces of grease into the housing. You don’t want to pack it, but you need to be sure there’s enough to sling around once things starts spinning. One important thing we discovered: Once you get all the pistons in their holes, you MUST line up the thrash plate so all the rods are directly inline with the pistons! If you don’t, when you tighten the front of the compressor, you’ll bend things and ruin parts. Ask us how we know. Anything worth doing is worth doing twice, right?