The new version of the SLO has an improved layout/PCB and they even used modern relays
And here's a really nice SLO PCB (technically it's a printed turret board with double thru-plating!) with very high-quality components. And guess what... it's from a *gasp* DIY'er!
Mako also uses high-quality printed turret boards with double plated thru-holes and flying leads. Very nice. Mako's non PTB construction is also impressive. You can tell the builder actually cares about his craft. It's a labor of love.