Hello,
The little Gunther Zagi prop is great. It works fine with a speed 300 or 370 (i get mine from Sheldons hobbies) though it does seem happiest on a speed 400. I don't think the Split would be as much fun with gear reduction and a lager prop. It isn't designed for big prop high thrust maneuvers. It is closer in design to a speed 400 pylon racer, though obviously a far cry from one. That's why I think it's potential comes out when you reshape it a bit to try and make it as efficient as it can be. Basically, this means reducing frontal area and shaping it so it disturbs the air as little as possible when flying.
I recently changed props. Mostly because I was having the same issue as everyone else ---- the Gunther press-on hub is made for a 400 drive shaft not a 300. No matter what you glue the thing on with, it will fly off at some point. I don't think most folks want to glue their props to the motor anyway.
I am now using a Graupner 4.7 x 2.3 CAM folding prop. It's housed in a little spinner and held on with set screws. Folding is nice for for belly landings. The prop will fold before it breaks our rips the motor out. Performance has been great.
I do not think this prop will work well if you do not sand down the nose. These props are best on low drag airframes. I have sanded mine down even more since I posted the picture above.
Sand the nose down so it has a nice arcing blend from the outside diameter of leading edge of your motor to the leading edge of your wing.
I like the torch on the coroplast idea. Getting CA to stick to things it shouldn't is all about changing the surface substrate.
I roughed up the surface of the coroplast with 320 sand paper and used 5 minute epoxy for durability. CA would be lighter though a lot more brittle.
I wish Free Air would have supplied the Split with a speed 300, a bit more aerodynamic fuse and some carbon strips for the wing.
I want people to enjoy this plane. It's so care free and satisfying to fly!
Two of my coworkers/flying friends have decided to purchase the kit after seeing mine fly. This is after they read all these negative posts about the plane. Try these mods before you give up on it.
I will let you folks know how they hold up in combat after the holidays!