I agree, you should add about 4 or 5 degrees of upthrust. Also it looks like you have not turned the prop around yet to act as a pusher. The printing on the front face needs to face the.... uh,.... FRONT
Sorry, sorry, I know, snarky comment.... LOL
The amount of reflex you need with your symetrical airfoil will depend on where the balance point is. The further back the less you need. Bearing in mind it does need to balance at least a little forward of the 25% point.
It would be good to have a friend do the first launch so you can be ready on the stick for more or less elevator in a hurry. Or launch out over tall grass.