Yup, that spring sucks. I've gotten quite good at it though by following how Badabing does it. Put the nozzle guide in (the plastic section) and pull it towards the back of the bolt, so its sat like it would sit if the spring were inside. Then push the spring into the hole where it's supposed to sit and use the flathead to compress it into the little chamber where it sits, and when you pull the flathead out, it will engage with the post where it should sit.