I doubt that you killed them. It sounds like you've splinted them up as good as you can which is the main thing. Maybe try to string them up gently in the spots where they seem like they might need it since they'll be packing on more weight still.
I'd just hang in there because it sounds like you've done what you can already. I think Latewood had a top cola that bent at 90 degrees and it lived and got huge just the same. Saw pics somewhere, think it was his.