Once again your awesome! Ive attached a 25W resistor I found based on your recommendations. Since the load will be almost 25% (7.6W) the rated wattage, will I even require a heatsink? Without a heatsink it says it would be good up to 12.5W @ 25 degrees. In the graph it shows it would be about 20 degrees C but thats with a "standard heasink" right? Also, the max voltage this circuit should have is 13.8vdc so Im guessing the 20V max rating WILL be ok? THANK YOU, THANK YOU, THANK YOU!!!