dollar store (or whatever you call them in the UK)
I think SM is a pretty cool guy, eh builds unicycle-bots and doesn't afraid of anything
This is not cheap hardware store aluminum, this is the kind they send into space.
Chassis Construction Chassis construction generally takes one of a few different routes. The first is an internal frame with armor attached to it, the second uses the frame members as armor, often with connected plates of material forming the structure, and the third is unibody construction, where the majority of the frame and armor are cut from a single piece of material. Building a chassis using an internal frame with armor panels mounted to it tends to be the heaviest of the three options, though often will be the most durable and easiest to repair as the portions of the armor most likely to be damaged are easier to remove from the rest of the robot. These frames typically involve a welded frame with armor bolted to it. Frame as armor construction is generally in the middle when looking at strength vs. weight. By reducing frame and armor into a single part, you can reduce the size of the machine and use relatively thick materials in areas likely to come into contact with weapons. Frames like this are more often than not bolted together. Unibody construction will typically be the strongest per pound, however it is also the most complicated to manufacture, as all features will need to be added to a single piece of material. This often involves repositioning the work piece many times during the construction process. Care must be taken to avoid misalignment of holes as the work piece is moved. The good strength to weight ratio, the best of the three mentioned, is due to the reduced need for fasteners to hold the chassis together and the lack of areas only held on by hardware.