I would get the right prop if it was me. I have the same plane and it has to be hauling a** to take off. I trained on mine and never changed from the 12x6 because the plane flew plenty fast enough without going to the 12x8 after break-in. This is an awful fast plane to start out as a first trainer IMO. Also, use a plastic Master air screw 12x6 and put rubber 3 1/4" wheels on this plane for a grass runway. Wood props won't last long on landings with a new flyer.LOL
Ronnie
edit
Also order an extra set of LG's for $7.00 from tower for the new flyer
Loc-tite the motor mount to firewall screws as they will fall out 1 by 1 no matter how tight they are.