just a quick summary of how i can see its been constructed.
all 6 legs are basic with no work.
grabbers at the front are legs, no work.
claws at the front are basic, yet again.
tail is a claw arm, with a plate added to it and the 2
TL reaper auto's fitted to it.
body is simply the lower section of the defiler, legs added to each slot, and front claws just glued onto the front where theres a space.
center cannon with mounting fittings just glued onto the front.
then its just armour plates from the legs on its spine area with spikes thrown in.
hope that helps to some degree, and sorry for any poor grammar