i useds a reg. ole tire iron to pry my rings off i found out that the rust helped get them off it made an abrasive surface that the rings could cling to so they wouldn't slip back problem is first one i did i found the tapered spots first and tried prying them of course it wouldn't go so i tired WD-40 and after i lubed er up then i found the square notch and now i still can't get the ring off i've heard that taking them off you can do but airing them up, leave it to a professional or wrap a chain around it that goes throught the center of the rim in 4 spots i busted a finger nail off by trying to pry a ring off that was 4 months ago and my finger nail still ain't fully grown back
Nate