Center Spar - Ready for Drilling and Rivets

Finished ALL the pieces for the center spar assembly.  Next I will clamp the pieces together, mark the drilling locations, and set up the work table for drilling.

Here is the center spar laid out with all the pieces

I will do the same for each wing spar.  Not done fabricating the wing spar vertical stiffeners yet.  Want to concentrate on getting the center spar done.  Two reasons for that; 1 - everything builds from the center spar on the CX4 and 2 - It's good practice to build the center spar first before turning to the main spars.  If I screw up on the center spar I'm out a few bucks and time to rebuild, if I screw up the main spars it's a major expense in materials and time.