Are you even reading any of my responses? Line breeding is great, proving out a line is awesome. But to prove out differences in similar / same morphs, you need to start with that specific morph. The PUREST.
If you are saying you want to take on line breeding lessers or butters because you think your selective breeding can make a better line, that is great. Breeding the highest contrast or cleanest patterned or whathaveyou. That is fine, nothing wrong there. But if you are insisting that you are line breeding to prove the difference between these two morphs, it is kind of a huge deal your NOT starting with a first generation lesser from RDR...
This is my last attempt to try and get the point across...I feel like I have repeated myself 3 different times with 3 different wordings and still you are not grasping what I'm trying to say.
Line breed all you like and make a beautiful line, but that will not prove anything about the two morphs. Sorry. I'm sure you will prove out some stellar line, but it won't show anything towards the original discussion of butter vs lesser. That is not me being close-minded, that is you not comprehending the process of starting from the beginning. I'm all for proving out the difference in the butter and lesser, I think it would be very neat. But I think you're going about it the wrong way to be taken seriously about your endeavors.