I've got an annoying rattle coming from the rear of the car that might be from the tailgate moving as the car flexes during cornering. Does anyone have any advice on how to adjust the latch/striker plate? Does the plastic/stainless steel trim strip that goes across the front edge of the boot opening need to be removed first? And do you just loosen the two torx bolts, move the striker plate and then tighten the bolts, or does the plate move up or down as you turn the bolts in either direction? Thanks.