I forgot to post this update but I did make some progress since the last report in June. Finished mounting all connectors, buttons and encoders, see photos below.
The weather has bee quite warm lately which is why I haven’t done much progress. I don’t really feel like turning on a 350 °C soldering iron when there is already 25+ °C in the house. But now I have lost my patience and since the weather forecast hasn’t changed much I will just try to sweat it through and finish the UI board this weekend.