I saw the 510R cylinder, and I am chomping at the bit to get one. My only question is about vibration. I have heard that the other big-bore kits (330, 350, 400) have more vibration than stock. I can see this happening because the rotational mass is increased and the counterbalancer remains the same. How bad is the vibration with one of these? The 510 kit will greatly increase the rotational weight, so it should vibrate even more. Maybe I could have heavy metal inserts pressed into the counter balancer to try to calm it down. I'm just looking for answers because I am going to buy one when it comes out, but I don't want it to shake like a chihuahua.