Agree fully about the correct valves to begin with, so I've got an email alert scheduled for the 80mm valve continentals.
In the mean time I went for a band aid, the Lyzene extensions, not ideal but it will do for now and I can use in the emergency pack.
You can get by without valve extenders on those size rims. I ride 50mm Carbon clinchers and use 60mm Bridgestone tubes with no probs at all! Valve extenders are a true pain in the arseY's have them....
Yeah I will find out in a little bit, hopefully it can grab on 1cm