How to adjust Antisquat on B4.1?

[Shorty]

Hi,

I've read tons on what antisquat degree set up suits which track surface, but can't seem to find anything about how to actually alter it in the build manual!

I'm thinking you add washers or shims somewhere when you assemble the rear end, perhaps under the rear arm mount?

I'm probably missing something obvious, but any pointers greatly appreciated!

I am using the RTR version of the B4.1