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Just a thought regarding power savings and LED lights. You may get better power consumption AND less tedius crappy soldering/heatshrinking if you used the LEDs in series with a single resistor at the end of the string.
You are using 12V supply, a LED (assume 2V drop) and a resistor. There is a 10V drop across the resistor (510ohm) so you're pushing about 0.02A through the LEDs, that's 0.2W per resistor wasted.
If instead you were to string 5 LEDs in series, you'd have a 10V drop across the LEDs, leaving you with 2V to burn off in a resistor. To get 0.02A across a resistor at 2V you'd need a 100ohm resistor, and you'd be burning off 0.04W per FIVE leds as waste.
If you wanted to do without the 12V headache altogether, you could run 23 LED's in series to the 48V supply... you'd be left with 2V, so you use a 100ohm resistor and you've got 0.04W burned off for 23 LEDs.
Adjust my math based on the actual current usage of the LEDs you are using.
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