Removing the weight verification would make me reconsider self-checkout machines. There are other stores that I frequent where the weight verification is off, but my grocery store seems to be the only one to keep it enabled.
The part that grinds my gears is if I don’t allow the machine to verify the weight and scan the next item, I have to sit through the entire TTS message that explains what I’m doing wrong before I can correct my mistake and move on.
Would either Calckey or Misskey be a good fit for what you’re looking for?