No pictures again. Getting the longerons to match the curved profile exactly is not really difficult, it is tedious. I lucked into getting the right longeron almost perfect the first time I bent it. The left one got close but the angle gets fussy and one adjustment throws something else out. You definitely have to work carefully and think through what bit needs a little more bend and what bit needs a little less bend because it isn't exactly self-evident. Got a little closer and got a little frustrated and called it a night.