Hey Tim. My guess is that you are shooting your body plastic too cool to get a good weld between the tail and body. Try bumping up the heat of the body plastic and see if that helps. Also, it helps to shoot your tails then the full bait as soon as you can. The longer plastic sits around the more likely it is that it will bleed a little oil which can also prevent a good weld. When I shoot two colored baits like that I shoot X amount of tails then come right back and shoot the body color as soon as I am done shooting the tails. Good luck !