revised design
Trying to cut down the amount of heat.
The addition of a 1 ohm resistor might work but going to try the 330 ohm first as the circuit board is already to etch. Just inserting a 330 in place of the 1K (R1 & R2)
PLUS I am using heat sinks instead of a short piece of aluminium for each P channel TO-220 Mosfet.
The circuit works great. The deer, Elk, as well as birds run for cover within 100 yard distance from vehicle.
Presently have unit in passenger compartment but plan to mount under the hood by the grill for air flow.