Ah feck.. Damaged bb threads.. I guess it might have happened when it was getting blasted.. It's funny one bb is hit or miss, it goes in some times yet another won't at all. I'm going to get the threads chased sometime.
Mavic Crossrides all sorted ready to mount. I had a problem with the 9 speeds cassette being slack, so I fitted the Mavic 1.75mm spacer and all is spot on now. So just a word of warning for those (like me) who didn't know you may need to run this spacer on Mavic wheels to use a 9 speed cassette.