Subterranean Assault questions

Hello hivemind.

I am wondering if I am interpreting rules correctly. In Subterranean assault the Vanguard Intellect enhancement allows you to bring a character unit from deep strike round 1. Giving this to hyperadated raveners allows them to create a tunnel marker round 1.

Is it legal to then bring a tyrannocyte in from reinforcements, using the tunnel marker, 6.1" away from my opponent and disembark a screamer killer also 6.1" away in round 1?

The second question is if I bring a unit of normal raveners in from reserves via a tyrannocyte round 1 do they get to set up a tunnel marker?