Hi,
In an earlier contribution it was questioned whether 126k rpm was too much for this engine. It was recommended to me by WREN that the 160 should not exceed 120k rpm. I have two unused WREN 160 (one bought in 2009 and the other in 2012) which were sent to WREN for inspection and upgrade. I have yet to see if this upgrade was worthwhile or not. I paid for all incidental expenses. We also have experience of a blade shedding here as well. Luckily my friend made a safe landing.