Sadly, an XL option is not possible with these stones. Many have asked about very coarse stones... i'm currently testing coarse stones similar to this. Sadly, they are much more expensive.
Making a video might be possible... just have to find time, which i dont seem to have a lot of now days.
As far as cutting speed through their lives, they are pretty consistent... they are a tiny bit faster the first 2-3 uses, but then they settle into their normal rate and stay that way throughout the life of the stone.
The naguras will be included with these if we decide to go ahead with this.
At this point, it seems like there is significant interest. Maybe i can make a quick video or something to help people get a better sense of what they are like and then we can set up a small first run (maybe 5-10 sets) and see how they go. How does that sound to you guys?