I often find cultivars with the ' mark before and after for plant parent entries in the daffodil DB that were put there by a former moderator. I used to delete those in the interests of equality and consistency but stopped due to time considerations.
@dave - could you get rid of those across the whole daff DB? I think they're only found in the top part of the daff DB mostly in the pollen parent box, occasionally the seed parent box.

I like the idea of measurement conversion availibility.