Just going to say that there seem to a lot of questions with 'How do I make a SD card image smaller?' or 'Fit SD card image onto other (smaller) SD' etc:
- Truncating SD image
- How to shrink an image file after allocating full space
- Image of a 16Gb card containing unpartitioned space at the end: Truncating possible? (very similar to method I use, which I know works....)
- Copy existing Raspbian installation to smaller SD card
- How to restore Image of SD card from a larger SD card to smaller one
I can't make head or tail of whether any of them should be duplicates... would it be a good idea to edit/add new clearer answers? Also there are probably lots more questions I didn't find...