Scott.... your " fairly good udder" would be considered to be a " near perfect" udder in some herds. The Buster daughters you have, are as a group, the these set of uddered females I have seen. It is too bad that Buster is gone as he is a bull that could (and/or should) be used for decades.
I know your Buster daughter selling at Agribition is a good one, as I have not seen a poor Buster female come from your place. She will have lots of friends I'm sure.