It sounds to me like you are doing great. One thing to remember is, if they crab when you go reach out to them, don't pull your hand back. If you do it teaches them that crabbing works, and gets you to leave them alone. You want to teach them that you are not a threat.
What really helps is to get them into the bonding pouch, put a piece of felt that you've kept in a pocket in with them so they have your smell, and rub them from outside the pouch. Usually the crabby one's start crabbing when you rub the pouch, but just keep rubbing and don't stop until well after they give up crabbing about it. At least, that's what the breeder told me to do with my girls, and in no time at all they quit crabbing altogether.