Hi Brenner,
I think David and Tony are correct about all the extra prop area in front of the CG.
However I like the effect of the extra 'drag' at the rudder TE. That's the place to have it.
My models are very stable in all aspects.
They are most sensitive going vertical up under power - but stable.
45* down lines need 1/3 power to overcome brake effect/prop effect but that is still a very nice steady pace. Pull outs also require earlier than normal power up to 1/3rd.
I think Dick is correct about the skinny fuz and you about a sharp fin LE.
Dick is also correct about the flare shape - a gradual development of the flare.
I do this by making a triangle with 0.2mm carbon sheet - it looks like a triangular tube with 20 to 25mm deep sides glued down two only of the corners full length. When cured I prize open the 3rd corner and slide it down the ruder TE. This creates a progressive flare.
Next time I will photo the process and post it here. I could not perceive any extra drag but the model is stable in yaw.

I reduced elevator and rudder throws until I had just enough + a little to spare.
It is surprising how little is enough with this set up. ie for normal flying.

Brian