Les, your data is most interesting. I only wish the resolution was finer a bit.
The reason behind it is that it looks like the optimal thickness for all grpahs is the same.
I know it is not but it looks like differences are extremely small and can be disregarded.
It is very good news for costs of production since it'd mean 'one size fits all'
I jus wonder how this relationship behaves for more powerful elements and more complex cold plate geometry? Are differences going to be equally minuscule?