Thanks boss and Cadtech.
Cadtech, I allready figured out how to secure the batteries. I will use the parts from my xray evo2.
http://img341.imageshack.us/img341/4280/xray0110lo.jpg
I only need to design a battery strap that fits over my 10 cell slots. And I allready did that :)
Good thing that you mentioned the thickness of the chassis. I think I will go indeed 5mm. Milling some places down to 3 or 4mm seems to me not like a good idea, because there are allready so many holes in the chassis. I really need a strong chassis for the BL power.
Here is a screen shot with battery straps and shocktowers mounted:
TOP:
http://img500.imageshack.us/my.php?image=top1oa.jpg
FRONTLEFT:
http://img345.imageshack.us/my.php?i...nksvoor0om.jpg
FRONTRIGHT:
http://img345.imageshack.us/my.php?i...htsvoor3ob.jpg
Let me know what you think of the battery straps and shocktowers!