How often were you getting punctures before? Did you check the inside of the tyre before refitting? I went well over 10 years without a puncture then had three last year (February, August and November); the first was a thorn that plugged the tube and tyre with no apparent loss of air until I got home and forced it out, the second I never determined but it was weird - so small I had difficulty keeping my eye on it but the tyre deflated fast, the third one was glass. I was so shocked when I got the first one that I decided to keep a log. Haven't had one since. My tyres aren't showing carcass yet but the back one is rather smooth and flat-profile along the middle of the "tread". I've got slow-rolling Vittoria Randonneurs (the original version) on but I've got a pair of faster foldable Randonneur Pro Mk II ready to go on - I'm going to get as much out of the old ones as I can first.