Team Riobotz have recently release a high quality tutorial for building robots, it covers nearly everything you will ever need to know about building a combat robot. I've decided to post it here as it has a lot of information that could help people improve their vapourbot designs and improves stats in whole.

http://www.riobotz.com.br/riobotz_combot_tutorial.pdf

It's a large PDF file, with 300+ pages, but definitely a good read. I highly recommend it, as well as the Paul Hills Website