Match drilled the floor stringer field rivets I didn't get to yesterday. Also took an awesome selfie with them in the background (below).

Called Vans and verified that the #10 holes common to the skins & lower longerons get countersunk, even though it knife edges the skins. Kevin at Vans verified the skins being knife edged is more desirable than dimpling them and having a countersink deep enough to receive a #10 skin dimple in the lower longeron.

Didn't have a #10 or 3/16" piloted countersink, so I ran down to the Yard Store, fully prepared to pay $26 for one, but found one in their used bin for $1.50 Sweet! Countersunk per print.

Started at the tip of the tail and spent about 1/2 hour verifying that everything was match drilled all the way to the firewall.

At this point, all the match drilling and support structure fabrication is done. I can hardly believe it, but it's time to take this all apart again for deburring, edge finishing, dimpling, etc.