Here I mount the touch sensors circuit, the sensors bar and the feedback LEDs bar (during this operation I broke 3 sensors, that I had to remake…).

I put in place the feedback LEDs bar:

Then I mount the very fragile sensors bar:

…too much fragile… this is the first casualty (that will be followed by other two…):

I connect the proximity sensor to the circuit and I close the side panel:

Turning on and testing the sensors:

Here I must remake the 3 broken sensors (2 hours of tension… I was feeling like defusing a bomb 😀 )

And finally the assembled circuit with all the sensors working:

A couple of pics of the sensors in the dark: