@Tracey Have the bolts on your Corto stems corroded at light speed, just like mine from being installed last summer?
I’ve still got corrosion-free stem bolts on my 2006 Felt racer, 2008 Saracen Pylon frame and the semi-gouged from RTA 2009 Specialized Tricross Singlecross!
… But I vaguely recall buying some fancy bolts, perhaps titanium, from Superstar ~2010. These might have not been stem bolts, but bottle cage ones, too old and forgetful these days to remember. 😳
35mm Corto and 747 chewy Knuckleball here, very happy, despite the stem being much shorter reach than anything I’ve used before (including the ~100mm 45 degree PX jobbie I bought to try and make my Felt rideable after my 2008 back injury).
PX now do 35mm clamp El Guapo Outlaw stems for £40 and £15 for Saloon bars.