after 8 planes, 10 days of visiting/traveling, 1 train 2 buses + cars... the theremin is still working, including HP's and amp.
But inside the case I have to make some improvement, I need to:
- change antennas fastening.
- modify the theremin positioning.
- build a protection on the amp power button, to avoid unexpected action on it from an element inside the case and then avoid any unexpected "low battery".