Now my question is if i remove the tab on the sc400 what will it do and what was the point on the tab in there anyways

 

do a search for threads started by ironcobra, i believe he talked most about those tabs in the projectors. Though if i were you, i'd give up completely on trying to modify the stock projectors to work with HIDs, with all this time and effort in opening them up and resealing them, you could have done a true retrofit.

 

i have some audi tt projectors coming with ballasts and ign also bulbs, i just wanted to know bout the tab thingy thanks