Squeezed the HS-1002 front spar together per Page 8-6 step 1.  The pneumatic squeezer did a nice job on the rivets with the longeron yoke installed.  I did have to use a smaller diameter flat set on the yoke so I did not mar the edges of the HS-1013 front spar doubler.  The radius and proximity of the doubler to the rivets made the larger diameter set impact the doubler and leave a small scuff while the smaller set did not.