I've been hearing a lot about the "Frankenpen" method of putting the Franklin-Christoph music nib onto a $5 Jinhao 450 pen body, so I bit. However, the feed and nib do not seem to align perfectly once seated in the Jinhao's section, and when I tried to put the cap on, I can tell that the nib is bumping up against the inside of the cap, and if I try to snap it closed, I'm sure it will damage the nib. I also tried putting a Zebra G nib (it doesn't come with a feed; it's apparently a dip nib) onto the Jinhao using the Jinhao's original feed, but that doesn't fit at all. What am I missing here?