So after the learning experience of Alligrator I have a new idea.

Basic idea is to repurpose an MY1016 to power an axe/hammer.
I'll reuse the electronics for controls too.

New brushed geared 24V DC 500rpm motors for drive.

Chassis shape I have some ideas but not fixed yet. But it will surely approximate a triangular prism. The slopes facing forward and back. The weapon should be a self righter.

After the issues with chain drives I am tempted to use fixed gears or a belt drive would be an option to reduce the shock to the weapon motor. Any recommendations?