For anyone that is interested in changing their original OTA-R31/TEH-R31 chassis. Kazama Auto has released a conversion kit from their GP-X chassis. IT does not include all the upgraded alloy R31 parts that Kazama offers but it does consist of:
2.5mm Black Carbon Chassis
Pulley Holder
Pulley Support
Battery Holder
Aluminium Antenna Post
Aluminium Servo Mount
2.5mm Black Carbon Chassis
Pulley Holder
Pulley Support
Battery Holder
Aluminium Antenna Post
Aluminium Servo Mount