You might find this helpfull if you are having a hard time getting your bezel to close all the way down with an LED Drop-in. Basically all i did was bevel the largest part of the module with a file as shown. Hope this helps!
http://mindpole.com/temp/creemod.jpg
http://mindpole.com/temp/SFmod.jpg
http://mindpole.com/temp/creemod.jpg
http://mindpole.com/temp/SFmod.jpg