Use heavy negatives on the dip machine for triceps. I absolutely love doing these. It's an effective, safe way to overload your triceps with heavy loads.
Have someone help you do the concentric portion of the lift. Then do the eccentric or negative portion by yourself. Take a few seconds to lower the weight.
Training raw versus with gear, a strong grip, and the importance of hitting PR's even when your life's in the dumper. You got questions, the Hellraiser has answers.