threeEwes, can you post a race report here of what happened, your gearing ( to see if the initial chart I put will work ), etc.
I am going to email Tim at MRC again, he is a pretty cool guy so since it does appear that there is an issue with the axles he will probably send them out to you for free. I already ordered a set just in case, maybe these are the new ones?
DaCookieMonsta: Are the axles you have over in the UK the new ones that don't shear off? If so, any way to tell that they are the new ones?