daisy_knotwise listened to the results on a pair of headphones and said that it sounded better to her than the tracks that I'd been fighting with in the studio for The Grim Roper. Of course, the technology is also about 30 years newer. :) But it seems to do the job nicely.
I paired it with a $10 multitrack recording app for the iPad. The app will allow you to connect to your iPad via Wi-Fi and upload tracks to your computer. From there you can send them via FTP to someone else who needs a copy of your scratch track. It's also got a number of other ways to dump tracks out, but this appears to be the most convenient way to get the individual tracks out.
So it looks like it will do the job. It does require an iPad with a Lightning connector, but that's what all the new tablets come with, so it shouldn't be too much of a problem.
And I managed to snag one off of Amazon for $30 less than they (and everyone else) is charging. Which is also good. :)