Ozzy, Idk what you mean by the corner thing, but as far as Halos, the size will depend on the Projector and shroud you choose. TRS will advise and know which size to get you when you order your retrofit, if you are going through TRS. The TRS Halos mount on the front of the shrouds via either gluing in place with an epoxy, or you an drill very small holes and use a fine wire to "tie" them on. If you go to TRS website and look in their "How To" videos they have a video for the "tying" method. This is their preferred recommended way. However if you choose to glue in place use an epoxy based type "glue" to adhere in place. Do not use silicone or anything like that because with heat build up and such those type of glues if you will can yellow and also give off gases inside the housing and tiny your lens as well. My retro is actually scheduled to be here tonight via UPS. I did order the Halos and can let you know how it goes once I get them done. As far as bulb selections if you get a retro from TRS, bulbs will come with the projectors, you just need to specify which kelvin rating you want. I chose 5K. Also don't know how well your housings are, but as stated in earlier posts, it's recommended to get new housings. As I can now attest that while the new housings do come apart a lot easier, the channels in the housings seem to be a bigger pain to get "cleaned out". The older housings do come apart harder but the opposite seemed true to me, that the channels in the old housing were easier to clean out the sealant. I actually took apart old housings as a practice run so I would know what to expect while taking apart the newer ones so I wouldn't screw them up. I did find that with the new housings when the sealant starts to cool its a bigger pain to clean the channels, so I just put them back in the oven for a few min and warmed up the glue again and seemed to be easier. Also if you have a "wire wheel" for your dremel, that will work awesome to do a final cleaning of your channels once you get all the sealant out. How all this helps. Good luck!
