Got mine today....not sure though, how to attach heatsink to the pcb. I got the triacs mounted on the heatsink, but theres 2 screws and spacers and no nuts. It says to put the screws through heatsink - not sure how theres no more holes besides the 16 for the triacs.
Am I missing something??
I've been here ...
First, unmount the triacs from the heatsink ...
Find the two smaller screws ...
Put a nylon(plastic) washer on one and push it through from the back of the PCB (the unprinted side), slide a spacer over it, and then screw into heatsink from the bottom(There are two threaded holes along the bottom of the heatsink - opposite from where it says "Lynx Express").
Repeat for second screw - the heatsink is held from the backside of the PCB.
Now, put in the triacs and secure with provided nuts - don't tighten them until they are all in. (You'll solder everything shortly)
Once they are all in, tighten nuts.
Solder the triacs as per the instructions.
Viola!