Calling out to Weezard for LED advice

[Weezard]

Finally. I'm making some jigs by cementing 2 washers together, so I can epoxy the LEDs to the heatsink without putting pressure directly on the lens.

I'm gonna glue first, then wire. Weezard, is 20 guage stranded wire enough to supply each individual LED?

I would not do that!

Actually, I did just that.
But, I won't do it again.
Solder before you mount ,or buy a honkin big soldering iron.

The heatsink steals the heat and soldering then becomes a chore.

20 guage stranded will do jus' fine for short runs.
For long runs, I'd use 16 gauge stranded.