2 Very carefully file all the stem lug.
Even up the thickness of the lug around the extension tube. Viewed: 78 times.
3 Filed stem lug Viewed: 77 times.
4 This is the important part if you are polishing the lug. Sand the lug with 80, 240, 320, finish with 1000 grit under balsa wood sticks. Viewed: 79 times.