I dreaded this task because edge distance is already compromised so the bolts clear the radius of the weldment underneath (ought to be 9.5mm and was 6.36mm instead - particularly because you can't debur the holes in between the longeron and the weldment itself). Come to think of it ... why not ... I guess I could remove about 10 nyloc nuts and do just that !! Perhaps I will replace all the nuts with lighter all-metal stop nuts while I'm at it.