Why get rid of prop walk, if you plan on using it can be your best friend. I have a h36 with a two bade (my preference), it will back up great, just gun for a couple of seconds to get flow over rudder. Once you have flow slight rudder changes over come prop walk.
Do a search in the archives. You will find all kinds of postings and evaluations of every kind of prop imaginable.I'm looking into the Kiwi Prop for a 41 DS and looking for feedback. Kiwiprops.com