Steps 1 & 2.  Rivet the R-1003A into position on the R-1001 left skin, leaving open the holes indicated.  You'll need to move this part back when attaching the counter balance weights later. 

Then rivet the R-1003B into position onto the R-1001 right skin, as shown.  Again, leave the holes shown open.   

07/21/05  -  1 hour

Step 3.  Rivet the R-1004 bottom rib to the right skin, as shown. 

07/21/05  -  45 minutes