This was my third fountain pen, but the fountain pen that really got me into the hobby. I have the medium, and it is an amazingly smooth writer. Still the most reliable writer I have (other than my Sailor 1911S.)
Yup, was hoping they were lurking somewhere in the deep crevices of the web. If you haven't, I'd highly suggest you watch the series. Downside, once you watch all the movies up to Mirai Fukuin, you will be waiting for subs too :3
Honestly, a regular programming language is easier to learn than Mathematica. That being said, for anything math related Mathematica blows C++ out of the water. The exception to this is if you need high performance, a higher degree of control, or you are just a masochist.