The new chassis is longer...15mm longer than his original design, I believe, you get a batt. box., new chassis braces, the center diff is more offset to allow the new battery tray, AL front brace, etc...
Here's the link to the new set up..
http://www.rc-monster.com/proddetail...od=rcmcrt.5kit
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S