I'm a swinger
I am partial to the swing keel. Yes there is maintenance but in the 5 years I have owned my 1979 Catalina 22, I have only done maintenance on it once. It is kept on a trailer and I rinseit after every sail. I dropped the front of the keel last year for inspection and all parts looked very good. For safety, I replaced the SS keel cable after the first year of ownership. The swing keel offers the advantage as a back up depth sounder. When it is down and you run aground (not if; when!)it is an easy matter to retract the keel and move off the obstruction. I have used this feature many times and it works well. (I don't need no stink'in charts!) Dropping the front of the keel for inspection was not that hard to do and it was done while on the trailer. Since I do not race (too lazy) I have left the keel its natural rusty brown color. I am testing a theory that a 550 pound piece of iron, rinsed with fresh water, will not rust away significantly in my lifetime. The next owner may have some issues with that theory though. Happy sailing.