Today the second Mouser delivery arrived. As written earlier, for some unknown reasons they had split my single order. Now I got the remaining resistors and headers:
Yes, I should make less pictures and start soldering… A few components are still missing. Knowing more or less for sure that I wouldn't get these e.g. in town, I have now also ordered jacks, tempcos and potentiometer at Thonk. Let's see when those arrive.