Best to Best and Cull the rest.
Find something that performs to your expectations........and breed them to something even better.
From conception to grave, always ask more of your dog and never be satisfied until it delivers.
Decide early....Tool or Pet, then utilize accordingly. (Doesn't mean cruelty). Working dogs deserve the time and care if they put theirs in.
Sharp shovels. Don't lie to yourself due to looks or attachments. If it doesn't work.......IT DOESN'T WORK! Scrub and hit the drawing board again.
Several generations of strict trial and error and you should have something to be proud of.
I agree with VERY LITTLE of this post. The part about being honest with yourself might be the only part.
I have never found any logic in spending more time, energy or money into a substandard product that never worked to begin with. But if you truly can be honest with yourself about what's in front of you.....then you either have a product that is sufficient and can be built on.....or you have reached satisfaction in going in circles.
Regardless it boils down to what satisfies you.