You have way too much empty space. Shorten the chassis. And do not add stock parts (classic, like Zteks and black batts), to DSL only parts. They are unbalanced.Also, have a look at the BeetleBros website (go to homepage), they have some very nice tutorials right there.Oh, and that 70kg hammer on a plastic extender makes me smile.
A couple of flaws in Naryar's bot:- use tribars over extenders- It dosen't need pink batteries. Unless you are building an antweight (less than 125 kg)or beetleweight (less than 175 kg) they are next to useless.- When you use HPZtek motors for drive, use rubber wheels if you have the weight. Grannys are much too big if it isn't invertible, and are heavier too.But do you see how much empty space there is in Naryars compared to yours? In his there is barely any room left for any components. Also, if you have the weight, build up to the 800 kg limit.
It's a good robot i know but have you known this that his robot is made backwards? :DD