Got a chance to really push the car up a mountain road and see how the cooler compare to a previous run.

Previous run:
Temp: 55-60F, Raining, about 50% max on the throttle, little to no brakes,
Oil Temp max 260F

This run:
Temp: 65-70F, Dry, max on the throttle of 100%, lots of brakes
Oil Temp max 260F

Basically pushed it a lot harder on a warmer day and kept the temps to what they were last time. I'd say this is a nice improvement for your average driver allowing moderate small improvement for spirited driving, but you won't find me doing this road once the summer temps kick. It won't be enough with this alone.

Yeah the DIY oil cooler will net you much more cooling. I used to get up to 260 with light driving. Now I can't get over 200 driving insane. The pan idea is good it would be better to have a aluminum pan with higher capacity maybe another quart and oil cooler combo.