I want to know if you crossed a male BG/RE with a GS or a female BG/RE with a male GS, from what I undeerstand hybrids can look completely different depending the sex of the parents you use in the cross.
BTW - the picture of the hybrid that Deb posted of the fish in the tank looks almost exactly like the accidental hybrids we had for a while in our pond, our did not have the yellow accents on the fins. I'm pretty sure Deb's picture is a GS X BG cross, about ten years ago I caught our neighbors hired hand using GS for bait while fishing at our pond. A small number of large hybrids showed up shortly after that but have not been seen for for 4-5 years now.