I've converted a Dark Talon into a Stormtalon, as I never liked the ST model. Admittedly, the DT is a more expensive model, but I much prefer the silhouette. As you can see I've flipped the wings, meaning the stylised Aquilla wings can be seen by ground troops as the ST flies overhead, as well as making giving the wings a dihedral angle rather than anhedral the model has built in. I also lowered wings as they looked really odd high up with the upward angle. I did originally stick the dark talon's missile racks on, but they really didn't work. I still need to fill the holes left from removing them, as well as the gaps from where the wings normally attach.
I also swapped out the heavy bolters with the two assault cannons from the ravenwing sprue. I was originally going to use the missile racks from the DT, but I kinda ruined them taking them off the wings, so more stuff of the ravenwing sprue in the shape of the Typhoon missile launchers.