and make sure you well seal the headlight once you're done.
Also, glue the parker light panel and globe housing thats held by 3 pieces as they tend to come off easily. Happened to me and I had to open the whole headlight just to fix that bit.
and make sure you seal the headlight very well. Yesterday i washed the car and the inside is completely fogged up because I didn't seal it after pulling it apart! Now I have to re-open it, clean it and seal it good.
oh and finally, don't overcook the headlight in the oven when melting the silicon sealing as everything tends to melt, especially the top headlight clips that are bolted onto the chassis.