UPDATE.
I finally removed the Kiwiprop and replaced it with a 14x16 3 blade prop. I now have zero vibration and it performs very well.
I found that the Kiwiprop got gunked up with growth quite quickly which prevented it from working well. If you use your boat often, like every week I think the kiwi is a good option but it seems like if you leave the boat for a month at a time it just stops working from all the growth.
If anyone wants to give the Kiwi a go I'll part with it for 300 bucks plus shipping. It is a good propeller, but I think you need to spin it often to keep it working well.
