Now that the ‘customs-guys’ have finally released the LED-driver ICs, I can finish this project. 4 Weeks is a looooong time for ‘air-mail’.
If you’re thinking about 100% hand-assembly, start with the LEDs first! Then add all the other small parts, then the potentiometer and as the very last part the IC. Use plenty of flux (paste preferred), clean your tip often and go easy on the LEDs. They burn easily. You’ll probably want a magnifier and lots of light as well.
If you use solder paste, you probably know how to deal with it anyway. So I’ll just shut up. But please make sure you put the chip and the LEDs on the right way. Your multimeter surely has a diode tester ;-)
Design-files and code can be found here.