Andrewac's way is a good and easy one to implement. You did not mention anything about the main gear but I assume that you moved them forward from the tricycle position. Proper placement of the main gear is important on a tail dragger; they must be forward of the CG, usually with the axle right under the leading edge of the wing when in flying attitude for best performance. To far back and lots of nose overs on taxi, to far forward and hard to take off plus lots of bounce on landings. You also want a bit of toe-in on the main gear.