Ve8 Build Help

[strugrat]

Hey guys,

Need help! Whilst assembling my car, and putting the front diff together, the M3 x18 bolts that go into the top of the spiral gear to seal the unit one of them has totally rounded off. Not sure why as it went in square but was so hard to tighten. By the time I realised it didnt feel right it was too late and I couldnt undo it or carry on tightening.

Dont particularly want to buy new bits as I've just bought the kit and to re purchase the front diff would be like £50! It's not leaking oil or anything but I dont particularly want to leave it like this.

Does anyone have any tips on how to get it out? Otherwise I'm off down the model shop tomorrow! I'm totally stuck and dont want to cause more damage.

Thanks
Ryan