This is simply great. The color scheme of black and red feels very classic and appropriate for Slizers, and I love the parts usage. I like the pipe texture, the visors used for shoulder pads, and those glorious red technic panels. The only part that seems out of place to me is the use of silver claws, but that is more or less a nitpick.
Says simple then proceeds to make a custom torso with gears and all sorts of black magic. Good job on this definitely better than the actual set. I like the way you incorporated the gears into the hips and whatnot.