In reply to beardy mike:
> Do you know what size the bolts are? Are the metric or Imperial? I'd imagine imperial being BD...
You are probably right Mike.
14mm fits pretty well though, snugger than 9/16 and the BD tool.
Just tried the BD tool and the 14mm on my Vipers. The BD tool actually works quite well if you use it like I described earlier.
So +1 for BD, but deduct a point as I once tried to get the torque setting for the bolts but could not find it in the BD website.