[Thin Lizzy]

Have you tried the tissue trick, you take some unscented toilet paper and put it up the sleeves on your arms, leave for a couple of hours and then place in his cage, curiosity will have him sniff it, this gets him used to your scent, do this everyday for a week, just add to the cage, most hamsters end up stuffing it in their cheeks and using it as extra bedding. Also, talk softly and quietly to him, even if you can't see him, this way he'll get use to your voice. When he's out and about in his cage, offer him treats with your fingers and praise him when he takes it. Good on you upgrading his cage. Has he got plenty of toys to keep him amused and hide in?