ok to say what differences there are from your design to ours, our dimplets were way smaller. 0.7mm each. we opted for 0.4mm but the chunk of that kind of drill bid was wider than the space between the channels and the cone, so we had to do with 0.7mm. secondly we have that cone in the middle, its there for turbulance, and flow separation. then that outer line you have made at the end of the fins. that is extra. that channel is way outside the cpu core, it will only restrict the water flow.
If i were you, i would make those spirals more twisted than the block we made, and make more spirals, or channels.
Nigozeg once posted his idea which was somthing similar, but with extremely small spirals and extremly long channels which was extreemly impossible to cnc it.
i would like to see improvements on that design though
