I was on Jags when I first encountered MRDs so running Derwents at limited RPM felt like an upgrade on ground running Adours at full reheat
I did have one scary moment at Laarbruch when a weld failed on one of the two mounts that attached the engines to the bowser. The bowser had been reversing at the time and the engine/cabin assembly swung round 45 degrees to the bowser. Luckily the fuel supply was flexible and I quickly shut down the Derwents.