Josh ,
I watched that video on youtube, which is a much better connection. It certainly is very impressive mate! I'm also very interested to know the weight of that model, as as keith pointed out the pitch speed on a 10" pitch prop at 4400rpm can get a bit critical and I'm guessing that the coarsair is actually a lot lighter than It's size suggests.
I'm currently looking in to what 3 blade props are available other than the APC's for use on an RCV 120sp in a 71" Zero that will probably be around 12lb. It's a shame that the Varioprop only has IC blades up to 11" IIRC as I have the 12c hub with a set of 15" blades for electric use only. So far I've found Biela props & Engel props that do 3 bladed versions, But the nearest size to what I'm looking for is an 18" x 11" from Engel, which I think might still be a bit low on the pitch speed. Biela do an 18 x 10, I'm not convinced that will give a safe pitch speed on a 12lb model though.........It could get expensive experimenting

Walts.