Really. In all seriousness, how hard are they to do. I've been on the sticky about timing belts and its basically a bunch of lads saying to send it to a renault specialist. But considering i'm a fully qualified mechanic myself i don't see the point. I can get a hold of the locking tools for the job. And i understand the concept of loosening off the pulleys to ensure the belt is tensioned correctly all the way round. Surely with the locking tools, changing a dephaser and belt isn't hard. The room may be tight but its the same with nearly any car.