I assume you mean for the X6.....
If so we already have a carbon fibre battery strap on the X60 which is due for release any day now, you can see it in the pictures on the following link
http://www.2wdrc.com/News/10-23-2008.htm
This will be a standard part for the truck and we will be doing the same sort of thing to fit the buggy too once the truck is here for those wishing to run LIPO across the centre.
Available soon at an X-Factory dealer near you..........