I would suggest a slight revision for re-assembly of the LED and the heat sink: Don't attempt to adhere them together via the heat sink compound. This just makes a mess and increases the possibility of fogging the LED light with smeared compound. Rather, I would suggest that you connect the wires to the LED FIRST. Then, assemble the LED onto the two little posts onto which it mounts. Yes, there is a clocking position that must be observed. Only then would I apply the compound to the LED and THEN screw the heat sink back onto the mounting surface; the mating of the heat sink to the LED is a secondary occurance of re-mounting the heat sink. It happens as soon as you re-mount the heat sink, so there is really no need for the separate step of "gluing" the two items together, as outlined above.