Just bought one , of Motorbreath ta
The Thunderace ones look better than the 600 ones , but they are not much lighter being made of some sort of alloyed steel .
so don't get one to save weight. I am quite happy with the improved apearence of the swing arm I finished it of with stainless steel allen screws, I got some extra m8 ones for my thou, "which has been badly neglected this season