I have to beg off on the idea of an exchange with Rockwell... this razor is an exchange. I purchased a 6C used it a few times and noticed that the two post were not seating completely in the base. It looked odd but did not affect the shave. I contacted Rockwell with photos asking if something was amiss; I explained that I wasn't looking for anything from Rockwell my inquiry was a point of interest. But they went ahead and replaced it.
So I think a second replacement is out the question.
I like BJP's idea and Marko idea of the mold is very interesting. I have been occupied on other things and haven't gotten to exploring some ideas presented: sharper blade, flater angle. But when thing calm down in few days I will explore these and report.