Quote Originally Posted by james...venom
At Robo Challenge we are also looking at how we can keep the sport evolving. Keep it interesting and fresh. One thing worried me though was the lack of diversity, 3 flippers, no axes & no crushers. With these sort of robots missing I personally feel the sport will evolve in one direction until there are just spinners and bricks).

Unfortunately people won't build new and different machines unless they can be competitive. At the moment if anybody built a crusher or an axe they would get written off by a spinner and have no impact against the bricks. So I feel we need to look at the rules to encourage different robots to be built. There are a couple of suggestions I am thinking.

2 - Limit the weight of robots with out an active weapon to 12kg or lower.
Not too difficult, keep it in mind.

Quote Originally Posted by james...venom
3 - Minimum ground clearance of 3mm for all robots with either a spinning weapon or no active weapon. (the 2 most popular robot types)

This is what I personally would like to see. I think that it won't take much away from the spinners and the brick bots can still do there thing with the spinners. Robots that don't comply at the moment would only require an easy fix to be back in the rules. It just means those 2 different types of machine (the 2 most popular) are a little more venerable to flippers, crushers and axes. I feel this would encourage these types of machine and make them more competitive.
As Jamie said, you may wish to amend that to allow wedges. Try:

Minimum ground clearance of 3mm for all robots with either a spinning weapon or no active weapon with the exception of a scoop/wedge on one side.
Any spinning weapons must be more than 3mm off the floor.

Here's some ideas I'd like to propose:
Any shuffler/walker must have a section of chassis 25mm away from any legs.
Any robot deemed by the judges to have ripped the legs off a shuffler/walker will forfeit the match.*Could you extend that to arms?*

Just my thoughts.