Just checking in with any owners of Mothers. I’ve got two and have had them for a month or so and one of them is already out of tune by about 2-3 notes. I know how to fix it but am just wondering how common this is on the Mother – the owners manual says not to mess with the calibration often as it is not designed to to be used often without failing.
8 years later… 
I do have the same problem, and I’m interested in what you know about fixing the problem. Any tips would be very welcome.