I just raised my body as needed. What I did was cut these...
http://www3.towerhobbies.com/cgi-bin...?&I=LXJK46&P=Z I cut them to the length I wanted to push up the body 10-15mm then ground a flat spot so they sat flush with the tower. Worked like a champ w/my mbx-5.
Inexpensive enough that if you make a mistake it is not a big deal.
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