Given pihole’s recent record with updates, I’m not sure I want them firing automatically.

Unfortunately I can’t remember whether I downloaded pihole from some package manager within DietPi, or whether I used the instructions on pihole’s site. It’s not hard either way, it’s really just one package.

I run it for my pi-hole. It’s been great. It tells you when there are package updates when you log in, which I find helpful.

How are you geoblocking?

Might as well link to it:
https://github.com/HarbourMasters/SpaghettiKart
You need to supply your own ROM of the correct version.