The flex version 1.5mm aluminum chassis cuts more holes to increase flex and reduce the weight recommended using in the med to low traction outdoor track.

Compared with carbon chassis it is 6g heavier.

Installation of the 1.5mm aluminum chassis requires the use of R142032 Motor Mount and R149007 Thin Screw Set. It is also highly recommended to use R149005 A10 Tweak Stick to install the upper deck to ensure optimal flatness.

You should also remove some material from the chassis locating pins that are on the lower bulkheads and servo mount.