Don Smith helped me identirfy root/tip and forward/aft of each spar.
Installed root doublers then made my first mistake. Riveted the Leading Edge Patch holes without the Leading Edge Patch part on the spar. Spent two hours drilling out stainless steel rivets!
Made another mistake by jumping ahead and installing a rivet before the root doubler was in place on the second leading spar. Drilled out another stainless stell rivet and ruined several bits before Jim told me to use oil and slow speed.