Just broke in mine a couple of days ago, installed it on a tf p51 mustang replacing my old os120FS, i have a 15x8 on it and the thing amazed me, the plane is heavy and was really slow with the os, i had a hard time landing it with the new ys115S and could only land it while the throttle trim was very low on a very long approach. SIMPLY AMAZING, it made me fall in love again with my p51. Recomend it to anyone.