I finally etched the board and soldered everything I had at home (the micro usb socket and the attiny are on their way ;D )

Also I managed to fit the sot23 version of the zener diodes on normal 1206 pads (I had 3000 of them at home...)

After etching:

After cleaning & silver-plating:

And finally after cutting and populating:

The pinheader is glued to the board using super-glue.