If you want to reduce the amount of random variety from the beans your getting don't buy F1s or f2s, look for breeders that have worked the lines out to f4+ thats when you start to see some actual stablized genetics. You can pop one pack of seeds and get 1-2 phenotypes instead of 5-6. You will get the truest representation of what the breeder wants when you grow out IBL lines that have actually been worked. F1 and F2 beans don't have any work in them. I'm not trying to be rude to the breeders, but its just fact.