Quick suggestion for the SSR4 Wiki Manual.
When the step calls for adding the Triacs, a part number would also be good to mention there.
That could help some (mainly me) from making the mistake of soldering on the 5V regulators instead of the Triacs. Of course this only becomes an issue if you are going the DMX route.
Anyways, i think the addition of the part number would clear up some confusion, as to not make the mistake of soldering the wrong thing on (esp. when they look so darn similar) .