Completed deburring and riveting the ribs to the main spar, I had to steal some screws to get the proper fit up on Rib 1 so i ended up ordering some additional hardware from spruce hence the 7 dollar cost which was mostly shipping as the screws were a little over a dollar and shipping was about 6. When it came time to rivet the rear spar i got through ribs 1 and 2 before getting to rib 3. When reviewing the plans there seemed to be a callout discrepancy in the plans as to what size rivets i should be using for the remaining ribs so i went ahead and stopped and sent an email to the factory to confirm. I am pretty sure it should continue to be CCP-41's similar to the other spar but its better to check then be sorry.