Started aux. longerons - these stiffen the side skins between the 904 bulkhead and the firewall. The longerons had to be twisted a little to follow the skin curve - I did this as per pic 1. Then I did the lower longerons (highest one in pic 2 as fuse is upside down) - had to make from heavy angle supplied. Not fun cutting off one side for a few inches as per plans. Twisted this one abit also, then clamped and drilled (pic 2).
