are the LEDs in the LP user replaceable? and if so how?
Depending on which LEDs…ask Voltor for the LHC mod… 
I must say…the button LED’s must be done at the Moog factory, unless you’re REALLY good and patient with a soldering iron, and can do surface mount soldering…I myself am currently no equipped for surface mount. The wheel lights, on the other hand, are fairly easy to switch out, but again…contact Amos before doing any such thing. PM me if you want details on my own mods…but Amos is the expert. 
Thanks, Prime!
Your welcome buddy…
Moog quoted me about 200 bucks to have all the Stage II lights replaced from burnt orange (is that even the color?) to blue. Apparently it is a very tedious process.
Needless to say, I am holding off on that mod.
Yes…first of all, the lights are surface mount. They each need to be removed and replaced with LED’s of your choosing, and unless you choose blue, Moog needs to source them. Expect the LED’s to cost a dollar each or more, and multiply by the number of lights you want to switch.
There are over 100 surface-mount LEDs on the Little Phatty panel.
So, expect to invest in that many LEDs plus at least a couple of hours of labor, either your own if you have the correct equipment, or someone else’s (usually at an additional cost) if you don’t.