I'm a big fan of Quad lock, it's good quality, very sturdy and the phone always feels safe. I've got the stem mount system, I went to fit it to the bike and unfortunately, even with its biggest spacers fitted, it will not fit the blade. Maximum spacer diameter 24.5mm, blade stem is 28.5mm. All the other options are off centre and, in my opinion ugly. Time to scratch my head and think of a fix. So I tried some rubber grommets from Tool station, at £2.27 it didn't matter if it didn't work. So using the biggest two grommets I warmed them up in hot boiling water and tapped them down into the stem, around 35mm. To be honest I probably could have got away with just the one, but opted to put the second in for extra support and to give a safety net I guess. Changed the spacers to the smallest option on the Quad lock and fitted the system. Waited for the rubber to cool down and gave it a good yank and the thing doesn't move. Well chuffed. Obviously I haven't ridden the bike with it yet, but I can't see it being a problem. Hopefully this will help someone.