Thanks guys. I’ll give the bolt idea a try, and if that fails I’ll try to see if I can find something to take apart to salvage a heat sink from. ....Otherwise, my absolute last idea is probably gonna be adding a step down voltage regulator or completely redoing the current limit design to use 2 mosfets in series instead of parallel, (that Otta cut the voltage/resistance for the mosfet in half; and therefore the power as well I hope)

 

Even if you share the heat dissipation between two mosfets they will still heat up to about 150 Deg C above ambient.

Les.

 

redoing the current limit design to use 2 mosfets in series

That would be a major redesign. Have you considered how you would drive the gates of series-connected FETs to share the load? But as Les says, you'll still have a heat problem (unless the load current is of very short duration and low duty cycle).

 

Oh I see, that wouldn’t help at all huh. Dang. Well then what would be the simplest way (but still reliable) to drive the mosfet so that it only conducts 1% of the duty cycle? I was thinking maybe take a 1kHz square wave to a single Rc lowpass to create a sawtooth wave, and then use that with a potentiometer to drive a bjt to create a variable square wave duty cycle. Or would it have to be converted to a triangular wave to effectively vary the duty cycle without rounded edges out of the transistor?

 

There are numerous PWM modules available cheaply online. Hardly worth making one.

 

Alright then, thanks man