Order your pcb design at jlcpcb for $2 (24 hours turnaround time). This is the most complex or detailed soldering I've done so far, the QFN20 package is very small but still not impossible to solder ...
Although jet engines are theoretically quite simple devices, in reality they tread a fine line between working as intended ...
Making an Arduino shield can be simpler than you think. This time I designed one to program Attiny and Atmega ...