I tend to go for 3mm Aliens. I go with 27Awg stainless steel so i can use reply on my DNA devices. Quite big Juice wells in the violator unsure there would be enough cotton on a single 4mm although juice control actually works really well with the ViolatorWhat builds do you run in your Violators? I've flip flopped between single 4mm and dual 3mm with different inserts, but I prefer the Fatality M25 over it in either config.