Thank you for posting, it is good to hear that you feel stronger after what happened. I agree that you should do everything possible to allow your children regular access to their dad, but, I don't think he will take your deal.
"There's nothing sadder than a conman conning himself"
“There is freedom waiting for you, On the breezes of the sky, And you ask "What if I fall?" Oh but my darling, What if you fly?”