I did the M3 Jan-08 paper under test conditions and got 73/75 and its grade boundaries were
100- 69
90- 62
80- 55
70- 48
60- 41
50- 34
But that paper on Thursday ate my brain and spat it out... That question 6... What the actual hell! So glad S3's a back up plan! What did people find K to be in the other centre of mass question?