It's been a long time since I've worked on the plane but I had time this afternoon to get back to it. I cleaned and primed the doublers of the rear wing spars and then started deburring wing ribs! There are 54 in total and I used the deburring wheel on my bench grinder and a smaller one in my drill to get about 60% of the wing ribs 80% deburred. Lots more deburring to come...