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I don’t know if it’s still the case but kernel support and related was nearly always an issue when I tested Raspi alternatives for building homebrew robots. OS updates were a gamble and support and documentation was not good to say the least. Raspi also has every HAT you can imagine to extend their capabilities too.
I dab with a square or two of toilet paper. A roll lasts a long time. Probably unnecessary because ours is precise but it’s really humid here.