Just spent a little time getting organized and trying to plan for a first small batch of priming. Deburred the spar extensions and gussets. Then tapped the tie down blocks.
I also designed a little jig to hold a sharpie 5/16 off an edge and my neighbor 3D printed it. Came out pretty nice. Concept to prototype in about 3 hours - so cool. It will be handy for marking rivet lines in j channels.
Cut the j channels to length and used my handy new tool to mark the rivet centerline. Made quick work of it. Cleco'd the extensions in place and clamped the upper j channels in place ready to drill. Stopping there for the evening.
Going forward, I'll work on one spar at a time just for managing shop space.