kits may contain parts that have warped.
These may be straightened with the use of gentle heat; cover the part with boiling water for a few seconds. Remove carefully so as not to burn your fingers, and reshape the part until the warp is gone. To flatten a straight casting, lay it on a flat surface, and hold flat. For curved pieces, hold in correct shape. Allow to cool in position. Once cool, it will keep the new shape. If the part will not straighten, contact the manufacturer.