I am rebuilding my 2000 Roadking police top end and I have read alot about oil migration and blowing out the air cleaner etc. I read that a good fix is the S&S Vent ring that goes on shaft prior to putting your cams and cam plate back in. Anyone got experience with this ? Used it? Liked it? Etc. I ordered one anyone as I hate doing things twice so thought I would fix it while I was in there. Should be here next week so then I can button up the cam work.