That sounds like a good idea. There's a heavyweight called Dead Bod which has a horizontal bar for a weapon, but originally started out as just a rambot with a wedge, using the bar as an interchangeable weapon after they got the kinks worked out of the drive. It's definitely a viable strategy. I'm not sure if they have a build diary but they are quite active on the Extreme Robots facebook group if you want to check them out. Good luck to you.