finaly i have the thermaltake coolers.
the base is a fraction larger than the akasa and also 4mm at the thickest part of the base.
The fins have a 1mm gap and are about 0.25mm thick.
the akasa have 1.5mm gap and .5mm thick
i will have lots of testing info soon compareing
maze 3
fin base with 3.5mm base 1mm channels
fin base with 2.5mm base 1mm channels
dimple base with 3.5mm base 2mm dimples.
so far the 2.5mm base is better than the others by 1C but they are all performing very close to each other including the maze 3.