I've spent weeks tracking down the right supplier for the right gauge/temper of stainless wire, then finding one who would sell me less that a million-yard spool!

Next was a method of perfecting the winding process for the ball ends, such that they would in no way slip, allowing for detuning when bent.

I'm currently in the testing phase, having put these strings on two guitars. So far, so very good!

Professor.