not really any thread sticking out past the cog to put a bb lock ring on (only about 0.5 mm)

I do ride it at the track, but only in training, not racing. I do come almost last in every pracitce race, but then I borrowed a track bike and still came last, so I know the problem is my legs, not the bike.

Just wondering why you are all so scared of it. If it is something to do with crashes, I don't really get it, if you are going to be throwing bits of metal at someone at 30mph, then does the shape of it really matter that much, unless it is really spikey. It is a really solid frame so it is not like anything is going to fall off it in the middle of the race.