I’ve grown some Dinafem 1:1 strains with good results. Early Amnesia CBD and Cheese CBD were both good. Gorilla CBD was not sexually stable so I don’t recommend that one.
Dinafem is currently out of business due to issues with the Spanish government…
However Dinafem invested in their own gas chromatography lab (The Dinalab) like a decade ago and it’s how they bred the CBD lines to consistently come out 1:1 from seed.
If I remember right, they let other breeders pay to use the lab to recoup costs of the lab, and Sweet Seeds (another breeder in Spain) used the Dinalab produce their CBD lines.
I’ve had good luck with Sweet Seeds autos and photos as have many other growers on this site and on AFN, and if I try to grow another 1:1 I’m thinking that’s who I would try.
North Atlantic Seed Co sells a lot of their seeds at a very reasonable price. I had a good experience ordering from North Atlantic and they have at least a few Sweet Seeds 1:1’s.