I have used a hobie baby bob float for the last 2 seasons. It works well. Each season I have intentionally brought the boat over to test my recovery skills and see how the float works. I can say it works fine, no going turtle. I sail alone most of the time so it is a little insurance policy. Also I get a lot of questions about that large "antenna" on the top of my mast, it has turned out to be a good conversation starter.
You need to fabricate an adapter to make it fit the 14.2 mast, as I did last year, this year I bought an adapter from a fellow 14.2 forum user ( Screen name JGM). It works well.
Do an archive search under Baby bob or Mast float and you should be able to see some past posts on the subject.
We have one on our C-14 and it certainly lets us sail with a lot more confidence. We had a bad turtling incident a couple years ago, and the "Bob" seems like a pretty good solution. Here's a LINK to the full story and some pictures of the mounting brackets I made. Hope you find it helpful.
Well, that's the thing. For those who are natural born sailors and never capsize, a Baby Bob is a nuisance and mostly unnecessary. Otherwise, for those of us who muddle through, it's pretty good insurance against getting in over our heads.