Ok, I got one fixture almost done. Just the fan and sensor circuit to figure out. I think I'm going to run a separate 3 wire just for the fan circuit to solve my wire shortage problem. Which will be much easier to fix if I ever have a fan fail. All I'll have to do is yank the fan off the heatsink and replace rather than have to pull the whole fixture to repair it. So here's the amphenol connector all soldered up:
And how it looks like once it's mounted to the heatsink:
I'm fairly happy with the final look of it.
And how it looks like from the back:
And the top with the fan and everything. The random wires still not connected are the fan PWM wires and the 3 sensor wires.
And a final shot with the actual DIY cable I made up hook in:
A couple quick questions for anyone who's done something similar:
How did you mount your temp sensor on the heatsink and where did you mount it? Directly above one of the LED stars?