S12-1M rear hangers and inserts

[ChrisCorbett]

Am I missing something here? When I try to assemble the rear of my car I can't get the rr hanger to line up with holes in chassis that the bolts go through, It's almost as of the hinge pins are too long.
I've double checked everything and my assembly follows the manual exactly ie correct length pins, correct spacer (2mm each side) correct toe/squat inserts seated fully home in the hangers.
I am totally stumped so any advice greatly appreciated.