I have a 6, not a 3. And never used a CS mount, so my experience may not be directly relevant. But I will tell you my experience with my 6. I originally got AWR mounts, like decades ago. Terrible. Absolutely intolerable vibrations. Though part of the problem was I also had the Turbine Tech front mount which I also do not recommend. Anyway, I threw away the AWR mounts, the TT front mount, and installed full set of Damond. (Trans, side, rear). And I got mine slightly before the street even existed, so I got the race. But honestly, I would almost think they sent me street by mistake except for the fact they didn't exist. I feel ZERO vibration. Not at idle, not at speed. ZERO. Z.E.R.O. I also "undid" my balance shaft delete. I did the delete on my original engine, but when I had a new engine built, I said I wanted to keep the balance shaft.
Now, if you look at my signature, you can see I have a lot of CS parts. And they make some good parts. But after one of my CS rear control arm failed and could have wrecked my car and did do a moderate amount of damage, and CS's complete lack of taking responsibility, well, I personally won't buy any CS suspension parts again. Of course that's just me and many people are perfectly happy with the CS mounts. But I wouldn't.
