I started out by riveting the forward most rivet in each of the eight most inboard main ribs, top and bottom, that only goes through the spar.
I then riveted the five outboard leading edge ribs. The most comfortable and stable position for this riveting worked out to be turning the cradle on edge. Only one ding in the skin and it just HAD to be on the top... :O(
Rivets Today: 161 Rivets Total: 3605
The forward most rivet in each of 8 most inboard main rib goes only through the main spar.