its really easy there is four nuts to take off (maybe 3) on the corners, which you've probably already figured out, and then its just a case off pushing and pulling the lights to get them off. The edge is covered in sealent to stop water getting in and might be worth heatng or removing with a scalpel or stanley but i found it easy to remove both off both of my k10s just with force and a screwdriver. (Be careful not to crack the lenses trying to pry the light from the outside its a bad idea!)