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This website seems to have some nice info about Micromice.
DO a search for Micromouse in your favorite search engine and lots of info is available.
Anything ranging from PCB to alluminium. There are some cool stuff u can get from rapid electronics which is a perferated metal sheet which allows stuff to be bolted to it, great for ur first bot.
here is my mouse using it
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This mouse has retired due to ill health, new one is on its way now
2. What material is for the wheels as well as the traction?