Cougar SV diff troubles!

[bumrar]

well, didn't have the best of starts with my cougar this weekend - only managing to finish two heats at Bury metro due to the diff unwinding itself and the circlip coming out of its groove. When it did go tho, it was superb! waaay waaay better than my tired xxx!. Another guy pitting near me was having the same problems with his. Is this a common issue? quality issue with the parts maybe? or just the numpty assembling it?

Regards,

Ste