I just bought a 2000 Warwick Thumb NT 5. The plastic Jan II that is on it is cracked and in need of replacing. I would really like to get a new Brass Jan III but they are somewhat costly. If anybody has experience with them I would like to know if they are worth the money and how much trouble am I looking at in changing it. My other option is to get one of the new tedur/graphite one for much cheaper. I am open to any input or suggestions. Thanks