Another initial feedback with a bit of delay due to holidays and strange transport logistics of FedEx.
Mimmo kindly supplied experimental e strings in two batches (A, B) for trial purposes. The first and thinnest e (0.670 mm) of batch A was installed utilizing a Diamond string tie today and didn’t break well after 30 min it was brought up to pitch and a bit of playing. So for the time being everything looks very promising!
The trial e is installed on a different guitar replacing an EJ43 top string of a combined d'Addario/Hannabach Nylon set which gives an interesting view on the tonal differences to Nylon strings. D’Addario trebles are at least praised for their good intonation and homogeneity which is perceptible. But in direct comparison to the pure sound of the sugar e their harmonic content sounds audible more dissonant at least in some positions. I’m again deeply impressed by the sound of the sugar e string and hope they will become a reliable and successful product.
BTW squeaking of this trial e is significantly reduced compared to the set where the top e string broke though not eliminated.
Provided the top e will "survive" the next two days, the rest of the sugar set will be installed on this guitar.