Strange I dont hear people complaining about pits. So basically, a pit is OK but a raised area is not. Sorry I dont see the difference, a raised section is just a pit upside down. How about a shallow pit, 25mm deep? The reason I ask these questions is that robots are starting to develope the same way cars have, that is take away the lights, windows and badges and they all look pretty similar. Flippers are a good example there are more Cassius clones than all other flipper types put together (BTW, Cassius had the first variable height capability and it could also climb a 25 degree ramp or a 50mm step). I believe that we need to get diversity back into robot design and the simplest way to do that is put obstacles back in the arena. Hey! ive just had a great Idea, lets put Formular one onto totally circular, perfectly flat and smooth tracks. Now that would make it realy interesting.