Hi, I need to replace one of my Carello headlights, the rear part (reflector) is intact but the glass broke. I have the correct front part (glass) on another headlight whose reflector is not correct and will not mount in the original position. The idea: Dismount the glass part and put it on the reflector of my original one. The questions: - How do you dismount the glass part (knife, cutter, ...)? - What sealant do you use to mount it on the reflector (looks like some kind of cement)? Thanks is advance for any help.