Got myself a nice cheap Tap and Die set, so now, I believe, I can focus on saving up for parts. The Tap & Die set comes with M4, M5, M6 and M8 Taps and the same size thingies that make screws.

Basically, the Axe is going to be at the back of the robot, and swing overhead, making it so it can hit front and back, with a pickaxe style blade. Either that, or do it the other way, so the wedge is the rear, and have it rest on that. Maybe do a scythe looking blade there too. I believe that wouldn't made it imbalanced, so I may end up with that. I can whip something up in paint, if my explanation is a bit too weird/stupid.