Received additional rivets from Zenith. Riveted the A5 locations I had cleco'd when I ran out.
My brain finally kicked in that I forgot to instal the seat supports for the sliding seat option. The rails for the SSO run perpendicular to the default one, so I had to drill the rivets and remove the original supports. Positioned the forward supports and drilled new line of holes in the cabin floor. Also fabricated the L angles and drilled those. Also drilled the armrest for the forward support.
Positioning the rear support involved drilling out the line of rivets for the forward gear channel. Fabricated the Ls for the rear support and drilled.