Thanks for your feedback!
@Unsullied_Spy
you are right. The battery sits very tight, but still can move a bit forward, backward. So I took a stripe of velcro-Tape, which has the the same size like the aluminium wich is right beside the carbon-plate. Then I've put a velco-stripe on each battery (on the lower edge). like that it sits even on the carbon-fiber plate, but can't move anymore. very simple yet effective. the more simple, the lighter (less parts, screws etc.)
The case of the esc is made of aluminium, and like that the alu chassis works as a heatsink for the brushless controller.
The hyper 7 chassis won't fit. I converted already a hyper 7 with truggy-wheels (
http://www.rc-monster.com/forum/showthread.php?t=20827).
If someone's looking for a budget buggy chassis, get a hyper 7. excellent quality (solid diffs, great plastic, it's almost impossible to brake a suspension arm), and it drives great. Spares are easy to get, and are cheap. Actually, because of the great overall quality of the hyper 7 I wanted to convert a Hyper st, but even used, they're expensive.
@BL_RVO
steering is a bit unpredictable, yet it drives very agile, probably more agile then the hyper 7 buggy, and at the moment, it's kinda easier to drive the hyper7. that really surprised me. so I have to work on the steering to get it more "smooth", have to change the "ackermann" I think (I have no idea). The truggy has quite a lot of weight at the front, and like that a lot of steering. Grip of the rear axle is ok at the moment, but In future I think I will get rid of the rear anti-roll-bar.
due to the low cog it's impossible to roll over the car. and the long suspension travel (negative travel) pays off on bumpy surface.
Compared to the hyper7, the truggy drives a bit "bitchy", I think just have to do some work on the setup. the torsen just kicks ass, the longer chassis makes it more difficult to cause backflips when the torsen locks. But, with that torsen driving is very different, you really have to get used to it. but as I said, no power slips to the front when hitting the throttle (and almost no balooning front wheels).
florian