Prep work continued this week. All of the ribs have been done and so now work has moved to some of the longer spar-related parts. Meanwhile, some Pro-seal became available, so a couple of tasks that were earlier postponed were completed. A bead of Pro-seal was applied to the lower outboard edges of the canopy rib assemblies (Step 8 on 29is/U-08.) All of the rivet heads on the firewall parts were also sealed with Pro-seal as directed in step 5 of 29iS/U-09.