Marking the nose ribs (left and right wings), then deburring the edges of the nose ribs with a die grinder and abrasive wheel.
Quite time consuming, and I still have to deburr the hard to get to crevices between each individual spar flange. Still lots to do on this - and then the other wing's ribs! (The plans advise doing all the ribs together as it "will save time" - well, it takes long enough as it is!
