The 130 will give you smooth flight at 120kts if she is in good mechanical condition ie not excessive swashplate play or play on the starflex spherical bearings etc. and her balancing is done correctly. Often we do balancing at low all up weight which does not give good results due the hammers under the floor tuned for 70%Mauw and above. The 130 here is operated hot and high with looong flight at EMS weights without issue. The company also have 119's which can not operate where the 130's are used. Best cruise speed is pull max cont power, then subtract 10% from the torque at max cont regardless whether torque is the limit and fly her at that torque minus the 10%. Also have a good look at your C of G chart and optimise it by adding or subtracting weights in the tail-you will be surprised how big an effect it has on the vibration level. If you get one with the AFS or FDC barrier filter, make sure you have a spare filter as the filter if not maintained correctly affects the Arriel ram airflow big time thus perf. Maintenance on them is low andceasy especially the fenestron.