Hi. The author is really sorry this is so late, so maybe he'll actually schedule the next one the day before. He hopes.
Four legs, each connected to the circular center piece.
Feet not separate from lower half of legs, predominant red coloring*.
Legs are twin rectangles connected by the same type of joint as the shoulder, the two halves are interchangeable.
All other factors vary with model.
Generally slow, although progressively faster over most of the successive iterations.
Walking (All versions)
Jumping (Model Six and derivatives only. Quite limited.)
Skating (Model Eight and above.)
Flight (With rocket modules. Model Nine and above.)
Rocket tubing (Model 10 and above, double as leg mounted blowtorches)
Extra leg joint (all models)
External radar array (all models)
Torso mounted missile pods (all models)
Railgun mortar (Model 8 and above)
Model 1: Initial release. Slow, not terribly popular, quickly phased out.
Model 2: Reworked legs, significantly faster. Production ceased when a structural weakness is discovered in the new joint.
Model 3: Legs are reworked again, now resemble originals. Faster than the original, but not as much as the Model Two. Used for several years, phased out for Model Four.
Model 4: Addition of telescoping legs improves speed beyond that of Model Two, improves shock bracing. Very popular, responsible for more than twice the sales of any other model, but actually had a fairly short production run, due to the release of the Model Five.
Model 5: General performance upgrade. Somewhat popular, but not as much as it’s predecessor, resulting in reduced sales despite more than twice the production time. Production ends with the unwelcome arrival of the Model Six.
Model 6: Stripped down armor to reduce weight and profile, nearly doubled range of telescoping legs, color scheme changed to dark blue. Changes are almost universally criticised, production halted. Design is renamed the Kallen Type B, gets an updated release alongside all future models, becomes reasonably popular in it’s own right.
Model 7: Rushed to production in light of the Model Six’s failure, acts like a heavier duty version of the Model Six. Reasonably well received, but suffers limited sales due to previously alienated customer base.
Model 8: General systems upgrade. Central body reworked to allow mounting of heavier missile pods and sensors, legs reworked to allow wheels. Gets marketed for military use rather than civilian, enjoys moderate success.
Model 9: Balance and power supply upgrades, rocket module made feasible for legs. Very popular among civilian enthusiasts, but suffers limited sales among them due to cost.
Model 10: Minor overhaul. Many systems streamlined, rockets now included by default. Sells reasonably well, but not exceptionally so.
Model 11: General systems upgrade. More emphasis placed on distinction between civilian and military modules. Networking between autopilots refined significantly.
Model 12: Networking further refined. Letheium core made legal with licence.
*Exception: Model Six and derivatives.