Here's is my Parasite of Mortrex painted in Kraken colors. I think DeathLeaper's body is a great base for the model because the tail is nice and long, and the area you attach the sything talons is perfect for wings.
Let me know what you think.
That's a good conversion. I like what you have done with the wings so that it looks like it's braking or hovering. I think your choice of the Deathleaper body is inspired.
The bolter flash is from Armorcast. For the color, I put down a white base, then went with a bright yellow, and finished with a bit of orange. I went back with a little bit of Timaya soot weather effects around the bottom edges.
Hope that helps.