Like I said earlier, you can come over my house one weekend afternoon and we'll upgrade your light together. I'll be sipping my Lemonaid while you solder away.
Alright, I know you want to be self sufficient and get the gratification of doing it yourself. Here's what you need to do.
1) First off disassemble the reflector housing from the light engine. Keep the reflector housing and all the part inside facing up.
- That will minimize the particles collected inside. A strand of lint will not be much of a problem in a MagLite but in your Draco you'll see it CLEARLY. As a matter of facts, I originally assemble the head part in a Class 1, then Class 10,000 cleanroom before I refine the assembly process to do it at home.
2) Now you got it apart you will see two wires connected to your LED, Desolder those.
3) Replace your LED. Remember about the electrical isolation of the backside. And make sure the leads & solder are cleared from the reflector when it mate.
4) Put everything together again.
Simple process, yet tedious to do correctly.