I recently purchased a serviced Parker 51. However it skips terribly, and starts hard.
So I asserted that the seller had maybe mislead me about servicing it. So I decided to take it apart and fix it myself. The filler unit works well, so I didn't bother to take that apart. I took off the hood, but realized that the seller didn't lie about it, the collector and feed were completely clean. I re-aligned the nib and feed with the collector carefully, so that the wide air gap on the collector is now precisely over the top of the nib. Then I pushed the nib and feed into the collector as far as they go, and screwed the hood back on.
Flow has improved a little bit (possibly because I aligned the nib + feed in relation to the collector better), but the pen still hard starts and skips and like hell. There is a very tight sweet spot, ie. I can hold it in a way in which it skips much less, and of course it doesn't skip when I apply considerable pressure, but... it is not pleasurable to write with it this way.
How can I fix this? What am I missing?