Noodler's Ahab - my first flex pen. But I'm not seeing the “flex” effect I was hoping for. Ink is OS Emerson (and I used gloves this time to fill it...) :
Noodler's Ahab Flex Fountain Pen - Medieval Lapis - The Goulet Pen Company
Noodler's Ahab Flex Fountain Pen Review — The Pen Addict
My Frankenpen: Using a Dip Nib in a Noodler's Ahab Flex Pen - YouTube