When did MRC start doing that? My stage 2 was done in Feb 2017 and the clutch is not locked. The car is an early 2015 and also has the AT supercharger - rev N clutch. No slip at ratio 2.99, although I do have a Fluidampr crank pulley. Audi did state for the original engine that the "rubber buffer" improves resonance damping which "significantly" reduces load on the drive belt. Maybe since Audi then had to increase the belt tensioning force by 32% for the CREC engine the reduced dampening from single piece crank pulleys is contributing to the problem?