Wait, there's pictures? lol.
Slono, a tight seal (from what I understand about aftermarket bits in the BBU, though I know not much at all about the IK lightweight BBU) between piston O-ring and loading nozzle is a good thing.
Bah, that was a waste of a post. Sorry, I'll shut up now and get some much needed sleep. Hope you figure out what's wrong with your GBB.