Yes I use FP's a lot, they are my main pen excluding work issues. I need a pen which will give 2 Carbonless Carbon Copies, a 3 part Gov't form, which is crisp and readable. The 3rd Copy is often included with Meds in patients bag. Thin pens give me terminal hand cramps by the end of a day of writing. I had JEB design and manufacture a beautiful FP like pen which has a 11-12.5 mm diameter section, which accepts the Hi-Tec G2 refills. This works beautifully for my duty use. The Cavalier refills are a bit short in overall length and long in the shoulder to tip length to work in my JEB Especial. Does anyone know of a pen with a thicker diameter that accepts the Cavalier Refill. Jim