Dude, the only way to produce stabilized, homogeneous seed from your WW beans would be to grow out your first generation, pick the best female (AFTER flowering all of the girls you got out so that you know what the final product is like), pollinate it with the best male, and make your first batch of beans.
Now, with the same original female that you pollinated the first time (yep this means you have to keep it alive the entire time. Actually, until you figure out which female is the best, you'll be keeping ALL of them alive. lol), grow out some of your first cross beans, pick the best make that looks like the female that you're trying to create stable seed for, pollinate again, make your second batch of beans.
Now rinse and repeat. Like 4 more times. It's called back-crossing, and this is what you have to so to create IBL's, or inbred strains that breed true for given traits that the breeder selected for.
In other words, quit while you're ahead. lol It takes almost a decade to actually create an IBL. That's why almost all beans sold now are F1's of the original parental stock.