Thanks, Heaviside. Figured I could count on you for the info. Not having been part of the Kickstart funding group I haven't been getting updates from Adonit. I think I'll sign up for the "clever" email group and see if that improves the information available. I did check the Adonit website fairly thoroughly and found precious little to answer the question. In fact, I'm not much impressed by the Adonit website from a support perspective. (Not that many manufacturers pay much attention to their own "support" pages on their websites; it's a common sin.)
And as long as I'm venting, I'll add another complaint. In order to generate a login for the Adonit website you have to give a user handle and a password. Fair enough. But the d**n password has to include upper AND lower case letters AND one or more numbers AND a non-letter, non-number character! Jeez...We're not talking about the danger of hacking a national security site! Rant off.
Edit: Well, replacing the disc hasn't solved the "missing strokes" problem. I really like the look and feel of the Jot Pro but the iFaraday (at least for me) is far more reliable as a writing instrument. I've found that if I use the "zoom" box available in Notes Plus and Note Taker HD (i.e. a magnified window on the screen that enables the user to write larger letters that are inserted on a small section of the screen) I can achieve better results with the Jot. And as I've found in the past, if I write cursively so the tip of the stylus stays on the screen, the results are improved.
Nevertheless, I still find my iFaraday styluses to be more reliable writing (and sketching) instruments overall. If I were to design a perfect stylus for myself, I'd have the Jot Pro body combined with the tip of the iFaraday.
I don't mean to discourage others from trying the Jot. When it works, it works very well. Feels more like an expensive fountain pen than anything else I've tried. And at least in my experience, Adonit has improved their customer service in response to customers reporting broken discs. I received two discs in about a week free of charge after requesting them. (Of course, the relatively fragile discs have to be factored into that issue.) If being able to see the precise contact point of the stylus on the screen is important to you, the Jot (or perhaps the Dagi Stylus) may be your best bet. (Although the
Amazon reviews suggest it may suffer from the same "missed strokes" problem as the Jot.)