Not much time to work this evening so I finished this part of the build by dimpling the four most inboard holes on the two HS 702 halves and countersinking those same corresponding holes on the HS 810 and 814 stiffeners. Just a bit of mental workout to make sure the dimples and countersinks faced the correct direction which is opposite of most of the other rivets. This allows the flush head rivets to sit flush on the back side of the spar halves. Fortunately I just happened to have some scrap HS 810/814 parts to get the countersink depth just right. So that screwup a few weeks back actually ended up helping with this part of the build. You end up countersinking the back side of HS 810/814. Next step is to get out the ribs and start preparing those parts to add to the HS frame. Oh and I finally cut out a 6 degree template. Should have done this earlier as it makes checking the angles a lot easier than using the digital angle finder.