You already introduce the butter to her, which means you've already ruined the chance at pos het clowns.
You should never place a recessive in after a co-dom male has been involved, if you want to call any of the offspring pos hets.
I'd stick with co-doms now and let the pastel het clown shoot a normal or two for some hold back pastel pos hets.
Awesome, that leaves the good stuff for us willing to venture into recessives
A pastel het clown X a bee makes 50% pos hets
She was with the butter last year. I know she could have retained sperm from then so.. I guess I'm leaning twords the pewter or holding out for late season enchi.