i have rm's on gr2's(dont hate, came on the car previous owner didnt have a clue). i would like to do csk's on my b14. i belive the combo is b15 inserts in b13 housings for the front? am i right? what about the back b15's again but in b14 housing? wish i could find those threads with pictures. but most of the pics dont work anymore.. btw the rm/gr2 is the worst ride ive ever felt.