Terminator walker concept

Hi guys, I have been having so much fun making these walkers I can't stop, I have planned on making a terminator army at some point so while the oil paint dries on the Nazi walkers I have been playing around with some concepts for terminator walkers, I bought a Necron army box a few years ago (that I no longer plan to use) and have found that it holds enough stuff to convert 3 big walkers, a heap of smaller walkers (will only do 4 though) 3 grav tanks, and I will use the scarabs as Necron destroyer type terminators or some sort of killer bots, I will try and reduce the "Necron" with my conversions, I will beef up the legs a bit, at least they won't go to waste.