I'm not fond of putting anything to a control arm (but I have done it out of desperiation). They were not made for that type of load in my opinion. To spend $$$'s to get alightment right and then destroy it on the way to the track worries me.

If I want to hold the car down by it's unsprung mass, I would prefer to use wheel nets or whatever they are called.

But thats a pain, so I just use regular straps to the chassis. But I have been looking at chains for the back because I don't have enough distance to use the straps well.