I have a broken Pelikan M805. The section broke off from the barrel. I want to remove the nib, but it seems welded in place. I have tried soaking in water (for days, or is that daze?) and it still won't budge. As a last resort, I have thought about cutting it out, but I am afraid I will damage the threads, and obviously I don't want to do that, I want to salvage the nib. Can anyone give me some ideas about freeing up the nib? Thanks in advance.