I managed to make drill and dimple the remaining parts of the filler box skin over the last few days, they now just need to be deburred and riveted together and attached to the upper firewall. I still have lots to do on the new house but I'm managing to put some time in on the Sonex here and there, hopefully within a few weeks most of the house moving stuff will be done and I will be making solid progress on the Sonex again daily.
