Heat-sink trans coolers. Who's got them, and how do you like them?

Boy, I was really hoping you would go for that other heat-sink one.Oh well....
Try not to over-cool.It could cost you a teensy bit of power and a teensier bit of fuel mileage.ATF seems to be quite tolerant of heat. Right up until it gets too much,lol
I havent had an A/T Mope since 2004, when I stuck a 318 in my FormulaS. I ran it several winters( Sept long to May long) with the cooler line just looped, no cooler at all. 904 took it like a champ.