It doesn't matter if you only do the cluster bulbs and not the other ones in the cars. But there are special recommendations like to do not the turn signal indicators because of the original relay circuit and the brightness of the LEDs in your face. But you could get a speacial relay for that. Other than that there are no concerns against it... Seems to be perhaps a short in your circuit or some other problems. Check your clusters printed circuit first and its plug, your headlight switch (turn it from left to right a few times), then...
Yes, the wall has gone since a few years - at least the one out of bricks...
Is your daughter in a Gospel Choir?
Yup. I'll just do the bulbs in the kit. My switch seems fine. My lights otherwise are as bright as I would expect for the year! I do have another switch coming just to try but probably not necessary.
Going into East Germany back then was a little strange but now I am sure it is different although there are still "walls".
I would not say its a Gospel Choir per se. There is also going to be an orchestra performing as well. She has traveled a fair amount already but I think this trip will be a game changer for her. I am truly more excited about going somewhere then I have been in a long while. I will be on the same itinerary but not really with her at most times. I want her to have some freedom. I might rent a motorcycle and trail the trip for a few days on that.