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@gbj_tester
Not sure how this would help
http://en.m.wikipedia.org/wiki/Rotoscoping
But if it distracts him from rotafixing at least it will save his hub threads from premature destruction.
No lockring on the track is OK because if you kick back hard enough to remove the sprocket on track gearing, you either have crashed or are just about to.
Rotafixing is bad because it gives an entirely false sense of security and can easily damage threads, which are marginal for strength anyway. The 1.37"x24 sprocket thread may well be the last bit of bad design from the dawn of cycling history we're still using.