Yes. a mechanic who owns a French car.

Working on my own car today. A bit of a job, haven't done one before. changing the inlet camshaft dephasing pulley as the old one rattles on idle, also changing the lower crankshaft pulley too. Its a large engine in a small car so is very tight. As with most old cars you tend to find more than you fix, I did find some graffti marked "DYN" behind the bumper and I also found a really rounded bolt that I needed to remove to lock the engine up with. I wondered if "DYN" had rounded the bolt off for me. After severel well placed blows with my fine adjustment tool later, the bolt was free and was able to continue the job.