Good afternoon everyone. I have been searching older threads and haven't come up with a height for tuning plates to the cooking grate. I know that you should put them above the baffle plate and opening but I'm not sure the distance from the plates to the grates. Right now in my build they are sitting at about 4 inches to the grate. They are 5" wide by 1/4 thick. My cooker is 20" by 52". Any recommendations? Thanks.