Do you have the possibility to keep 3 colonies?
One for breeders, one for males, and one for females which you don't want to breed?
If you have a colony setup where you can mark the individuals, you will know which does produce better offspring, and then select rabbits better suited to your needs. Kind of a
landrace. If it is a colony with more than one male, you can go the mob breeding route.
If you need more info on mob breeding, there is a
facebook page and a really good
video on the topic.
https://www.facebook.com/groups/2714426338868354/
Otherwise, if you bring in new breeders regularly and don't want to have your own selection, the inbreeding will managed as well.