Welcome to the forum 930man. Don't bother to open them, there really isn't much you can do now except let it age some for say 6 months. It will never get more body, but will tend to smooth out a bit and taste better with a bit of age. You have 2 options in the future. Either buy higher end kits which don't use as much water in them or you can get a Mosti Mondiale kit. Even the Vinifera Noble line has much more body for about the same price. If you can affor the Rennaissance line or higher, you will be rewarded even more.