Strange 7-String Phenomenon

[RJVB]

I found a Godin Multiac Nylon 7-string years ago (hard to find as they get shipped to Brazil) and a D'Addario .060 works very well: good pitch and decent balance.

In other words a heavy, steel low E tuned down a 4th? 7-string nylon string sets do exists, FWIW.