I just received my Vacumatic I ordered some time ago. I am really pleased with its condition, except fort he nib, which I initially found a little scratchy. Upon closer inspection, it seems that a good amount of tipping had been worn off. Since I plan to use this more often than not, will I be wearing away at the gold if I use it? I've seen a post saying that the gold nib wouldn't last if there were no iridium tipping. Thanks in advance!