I've read somewhere on this forum that it is possible to use a b/b lockring to convert a s/s to fixed. How does one do this, and will it work on a cassette that was converted to s/s. I also want to repaint my frame cheaply, but nicely. I would prefer to do it myself rather than pay a shop to do it. Can I simply sand the old paint to get some texture, primer and paint, or is it more complicated that that.