Aligned stabilator skin on sub-structure. began with bottom outboard corner with edge of skin extending 3/4" from outside of outboard rib. Opened the instrument probe mount hole in leading edge and drilled the forward spar to outboard rib rivets to allow better rib placement.
Aligned top in aft outboard corner and drilled several rivet holes on top trailing edge. Installed temporary rivets in top aft edge to maintain alignment when inverted on workbench.