Not done one of those, but I had the same problem with a Chris Reeve Sebenza. I ground the spine square with excellent results.
see:
Man that is just TOO PAINFUL to see. :shock: Grinding the spine on a sebenza square. Ouch! Man I love the rounded spine on my sebenza! Before I grind my $300 spebenza, I'll just settle for using a broken piece of hacksaw blade, eh? You're a braver man than me, Gunga Din...
Ouch!!
Hoodoo
. . . deliverance will not come from the rushing, noisy centres of civilization. It will come from the lonely places. - Fridtjof Nansen