Took the plunge and decided to swap the prop for a Flexofold when we hauled Cono Sur out for annual maintenance in March 2012. The factory fit three bade had plenty of bite both forward and astern, however it also had large amounts of propwash and looking at it, plenty of drag too.
The new prop comes as a kit that you have to assemble and here is the sequence to show the assembly. The only thing we had to alter was the shaft key which had to be filed to allow the boss to mount on the shaft. We decided to keep the rope cutter on. Really impressed with the quality of the engineering and from the service from Darglow who supplied us with the propeller and the knowledge on how to fit it.