Whats the best ink for a Jr Gents Fountain Pen? I recently turned my first Jr Gents fountain pen and put in the cartridge that came with it and its terrible ink. It keeps seizing up, will delay when writing, and seems to be a watery black color. Is this the ink or the nib or me causing these problems? Regardless, what is the best ink, both bottled and in cartridges, to use with a Jr Gents pen?