That last part... I was able to to follow directions well enough to assemble one integrated amp (at age 15), one tuner, one Hafler preamp, one AVA hybrid preamp, one Hafler power amp, one hybrid headphone amp and a few other odds and ends. I can "Prepare a 6" black wire and solder one end to S-1 Lug 4 and the other end to PC8 eyelet 8" with the best of 'em as long as I have a good pictorial diagram, which the Akitika does, but have never really been able to relate a schematic to what I see in front of me well enough to tackle 'bare board up' projects. And anything involving sheet metal, as much hardcore DIY does, fuhgeddaboutit.
One all-on-a-board project that looks interesting and easy though is the Pass 'Whammy' headphone amp. If only it had adjustable gain so it worked equally well with sensitive IEMs and 250Ω Beyers... And had an enclosure option...