I recently purchased a Sabre with a 175 ProXS. I received a 25p 4 blade Tempest plus with the motor. I havent gotten through my break in period yet but at short clips Im seeing 5500-5600 max Rpms and 64mph before I start chining. I know there are many different variables to getting optimum performance. Any other Sabre owners with a 175hp with 4 blade props? Should I move to a 3 blade prop? Any info would be great. Thanks for your time guys.