Dead ball contact

1. Is this Lead's call or Trail?
2. I've heard almost a 50/50 split on whether this play is legal or illegal

5. That's me making the call. I felt black had prime rebounding position and was displaced (even just a little) when white returned inbounds. I held my whistle until there was advantage realized. If the basket was good or rolled off the rim the other direction I would have let this go.
6. I ran to my partner to ask him if he wanted to upgrade. He said no.
7. Either a no-call or a block I think.