Hi, all. I'm new here. For decades, I've drawn cartoons with various technical pens. Koh-i-Noors, Rotrings, etc. My favorite of all was a Rotring Rapidograph-- a model that is no longer being manufactured. I've been testing different pens, hoping to fall in love with a new pen. I like a fine or extra fine line, and the ink needs to be ABSOLUTELY WATERPROOF. (Apologies for the shout.) I put a wash over the line, either an ink wash or a watercolor wash and freak if the ink bleeds. The complication is that I'm a lefty. I push the nib; I don't pull it across the page. If anyone has any suggestions about a good fountain pen for lefties, and a really serious black waterproof ink, I'd be "all ears." Many many thanks.