I'm Sergio (AKA Axeman), from Italy.
I found Zynthian while searching for a completely different thing, and as an analog synthesizer fan, I loved it from the beginning.
I already had at home a bunch of RPi3 used for other things (my VideoRecorder'o'death built with LibreElec and 4 DVB-T receivers, a RetroPie installation, a PiPresents installation, an Oktoprint controller, and some other device not worth mentioning).
I had no specific Zynthian hardware so I assembled a version using a HDMI 7" Touch display, a USB audio card, and some 3D printed encoders, the same day
It worked, but I think drivers for the audio card are too unstable because jack service crashes after a minute.
But I really liked it. Now I'm waiting for the HiFiBerry DAC and the PiTFT to build a "regular" Zynthian version.