Writing xenharmonic music is really tricky. I'm trying a pencil and paper approach, keeping most elements simple. I've written a couple of chorales using just intonation that explore shifting reference pitches. Sevish's Scale Workshop lets me try any pitches I want so my ears don't get totally lost.

Trying to write a chorale in just intonation. I'm using one reference pitch at a time as 'Do' and modulating into different key centers by keeping one note as a common tone.
I don't know exactly how this will sound, or how I'll record it, but it sure is fun to write with pencil and paper.

Been building my own instruments for years now. Since I'm my own customer I can set the standards as low as I want!

Here is my newest and current favorite one, a bari/bass console steel guitar. Tuned EADGBDEG, 30" scale.