Not really many prop options out there...Perf props have had some problems also...recently a good friends two blade wood prop came apart on his RV-4..no one is immune...the early Ivos were really ultralight props that guys put on longs and varis and low and behold they came off..go figure!...Ivo has never recommened any of his props even the newer higher horsepower ones for the higher horsepower 4 cyl engines....Yet they are recommened on the 6 cyls...and Velocity has recommended and tested them on the Franklin..with much improved takeoff performance..if you have a 4 cyl...it's all up too you...There have been no incidents with 6 cyls that I can tell..so if you have a six...it's an option...I would just follow the torque procedure and preflight it like any other prop...
