Would like to add a thought. Make sure the plane is sitting not nose up or nose down by adjusting the nose wheel up or down.in its mount. I've used a level on the wing saddle area if the wing is flat bottom. A nose high position makes the plane takeoff too soon and is hard to land, while a nose down position keeps the plane stuck to the runway until you have enough speed for the elevator to take effect. Before I'd change gear or gear configurations, I would check CG, lateral balance and how the plane sits (level hopefully).