- in the partlist, for r13 there was 10k shown. it should be 1.5k. the actual partlist ist ok.

- on the mainboard, the holes for the power-socket are too small. they should 1.1 or 1.2 mm. just re-drill these holes. be carefull not to completely remove the solder-pad.

- also on the mainboard, the 4 small holes for the usb socket need a redrill to 0.8 or 0.9 mm. the sockets i have available here fit tightly into the original holes, the sockets provided by digikey have very slightly bigger pins.

- on all boards there are no thermals on the pads connecting to the ground-plane. this means that these pads need a longer preheating period then the normal ones. so, as opposed to normal pin-first, then-pad heating, you need to heat the pad first for some seconds, then apply some solder and heat the pin as well. also the solder time is a bit higher. a higher temperature (i use 320 deg. celsius) also helps on these pads. but be quick then!

!!! ATTENTION !!!
You should be experienced in electronics if you whish to build this circuit !!
If you are not able to make your own pcb's and soldering them, ask a friend who knows how to do !