Another big day of progress, I finished trimming the aft ends of the longerons. There are two cuts to be made on each longeron – one to allow the VS vertical spar to fit flush against the F-712, and one to accomodate the F-711’s HS attach bars. First step is to trim the longeron aft end to accomodate the VS spar. Here’s one cut completed on the right longeorn

I used the F-714 aft deck to make sure that the side cutouts were properly aligned.

Here are the HS bar cutouts marked, and drilling/cutting is in progress on the left longeron.

After a lot of cutting, filing and sanding, the cuts are complete…