After the fall of the Mirnovy Campaign. Iron Father Roan began contemplating designs for a new machine. He tossed and toiled with it's concept and purpose for many weeks, months, and longer. But the main resources for this were scarse, due to being away from the forges of Mars, or any other notable allegiance to his Clan. This all changed when he received a single communication. This communication was from a man of legend, thought perished after many battles.
" A great war is upon us now. Mirnovy was the beginning of the Chaos incursion. These are the times where we do not fight among ourselves. These are the times where we unite and fight back against the enemies from the new Great Rift! Any and all resources may are at your disposal. I know that your Clan specializes in preserving the schematics for the vehicles of millenniums past and designing new ones of similar strength, so use them for your benefit Iron Father Roan.
Primarch of the Ultramarines"
With new orders in hand, Roan proceeded to his design console and opened his designs that he toiled with many moons ago. A new vigor filled him as the designs were now completed. This new machine will not be like the others. Not like the Predators, which are a tried-and-true death vehicle of destruction throughout his Clan. Not like the Land Raiders which protected his fellow Brothers in combat to positions most advantageous. No... This will be a machine beyond the toughness of these machines. It's size would not only house many of the brethren, but even those who serve in death. A shell that will never be ruptured, and a core never more stable. Unyielding as it charges in to the front lines, it shall be called... THE MASTODON.
This one is for the scale of the main body. While the size of the thing and the number of pieces looks daunting, it's not as bad (knock on wood) to build so far. The top was warped in the front 6 ways from Sunday, and it looks like the back may be warped too, but should be fixable.
Similar to the other one, This is of just the treads. Due to the mold blocks, the rear treads are a real pain to get lined up, so much cutting and warping is needed. The fronts are fine. A little gap, but hardly noticeable until you get close.