I made a Dreadknight conversion, because, basically I think the original model is dreadful.
I used the legs basically as is, just filled the reliefs, because I consider them to be a bit off for this model.
The torso was a bit of work, as I had to cut off the front torso where the terminator would have gone.
I then used left-over parts from the venerable dreadnought to cover it all up, and added some shields, as well as a head from the Defiler kit.
The heavy psilencer was shouldermounted using a dreadnought fist as a base, and just putting half a greenstuff ball on it. I topped that off with a sensorpod base from the command vehicle sprue.
I closed off the bottom of the heavy psilencer with a bit from the chaos vehicle sprue and added a sentinel powerpack to give it some body.
Finally, I closed of the other shoulder wit a storm shield, as I really hate those arm supports they have in the basic model. I have to say those fit remarkably well.
The arms are more or less as supplied.
Personally I'm quite happy with the way it turned out.