And, while you have the cap off, turn your mast upside down to get out anything that might be in there, like the inside of rivits that you drilled out.
I was hoping to do this when I removed the bottom mast casting (broke when putting up mast when I tried to straighten it too early). But I found out it was sealed about 7 cm from the base! I can't imagine how many rivets are in the mast- but probably less than in the HULLS!!!
BTW... good luck with getting the cap off. I about had a stroke trying to get the bottom off fighting the sealer and tryingnot to destroy the mast.
