Aluminium Chassis plate for MRX Master

-chassis itself is 12 gram and able to add 4 x 1.5g brass weight
- overall full gear weight will be around 162 to 165 gram with a ABS hard body (around 30 gram)
- it is good for 2500kv spec class which speed and acceleration is key of winning.
- a new motor mount is included for more low motor position.