I just double checked as I wasn't 100% sure...
Vanguard do actually do a tighter bore than .689, the Demon comes with a .685 and they are all available on the Vanguard website in several different lengths and colours. But I'm sure if you called Vanguard HQ in Nuneaton and speak to either Jason or Martin, they will look after you :thumb:
Click-o-matic
My Creed has the 14" .689, .693 and a 16" .693. To be honest I haven't been able to fault the quality, either bore just performs 100%. I can quite consistently put paint in the same place over and over, the only thing that has any hugely noticable effect on accuracy for me is the quality of the paint if it's too cold or has been stored for a while and dimpled.