Lou you sound like you are doing an incredible job with your little girl and that is all that matters no one could take that away from you and when all said and done when scarlett is grown up she will always know that it was you who did all the work and gave her all the love not him...then whatever rights he has WILL NOT MATTER as she will choose whether he gets the privilege to see her or not! my guess is NOT!
Him and his controlling mind games cant hurt you anymore as you are no longer together and you are far stronger than to allow him to again! but you are right to never leave him alone with your scarlett if for nothing else just your own peace of mind. i say just play him at his own game let him see her then walk away happy because that will torture him.... people like him will never be happy and its really sad that its all of their own selfish spineless doing, if you needed any proof just look at the path of destruction in his wake and just feel so proud of the fact you were brave enough to get out of the eye of the storm!!! you and your girl deserve nothing but happiness xxx