Here is my post a few pages back
During my Tomahawk build, I finally realised the mistake I had made which caused my re-re Scorpions rear arms to bind. Having owned many of these chassis, I just simply assumed it should be built like my original one.
The two suspension shaft holders have a tapered end. The correct way to install them is: install the taller one with taper side up and the shorter one taper side down,. Its clearly shown in the manual but I overlooked it.