We don't have any lightweight robots at RW101. In fact the lightweight class has never really caught on in the UK, although a few have been built. In the US, the Battlebots events have had some epic lightweight robots which have really proved how impressive these little machines can be - more violent than featherweights but will all the convience. If you are looking for a cheap way to get into combative robots, its certainly worth taking a look at some of these.