Nice work! I might steal that door lighting idea.
About vehicle clocks--Yes, the radio operated clocks can be a pain, more so if pushing a button is required. PIA to reset after removing power, also.
The absolute best vehicle clock we've had (beat out many luxury cars) was in a Mitsubishi Outlander. The 2" face was center mounted in the dash and was analog dial w/sweep second hand. Setting the dial was done with a knurled knob on the mounting trim. If space allowed and I was going to install one in a vehicle, I'd be calling the scrappers to locate one of these Mitsubishi clocks. The dial was a muted grey so blended well with the dash.