Really nice work. The mech looks cool and has some great rail/logic functions. The logic debug room downstairs is something I wish more people would add since it makes fixing problems so much simpler. One thing you definitely need to add though is a circuit to prevent spamming the animation buttons as that will mess up the rails. The wireless blocks ought to have no effect if the arm is currently moving. You can do this by having the animation be triggered by an AND gate which requires the wireless block to be active as well as a flag at the end of the animation cycle. The forcefield shield can also be moved to be part of the base ship instead of the forearm. It would look identical and reduce the weight of that arm. I also love the picture you took with all the best mechs side by side. It's my new desktop background.
New power version. I will begin to say it has a major problem, the structural integrity is very low and the whole thing blew up and crashed the game when the infinite sound loops of explosions got to overwhelming. But. That is forgiveable; In all the mech is very awesome and the axe strike animation and the shield and all functions are so cool that it still deserves a top rating. Video review incoming.
Another excellent mech, good sir. Arm works well with manual turret aiming. Cockpit looks really nice. There are tons of great little details that really help fill it out--lots of creative aesthetic uses for various blocks. A+