that's just it. the system is built up perfectly. the problem is that when applying EXTREME back pressure (such as that applied by a heavy rider stopping fast) is a predictable cause for failure in this way. i really can't see how any heavy rider can stop quickly on greased threads without some slippage occuring. maybe i answered my own question here. i don't know. i mean, do all you guys skip really hard to stop your fg's (with greased threads) whithout ever having any failure of this sort? i just don't see how that's possible without some sort of more direct opposition to the rearward force being applied to the cog. know what i mean?