Mine was tail heavy as well. Here's my thread on the issue this spring:

[link=http://www.rcuniverse.com/forum/m_2794931/anchors_2794931/mpage_1/key_/anchor/tm.htm#2794931]http://www.rcuniverse.com/forum/m_2794931/anchors_2794931/mpage_1/key_/anchor/tm.htm#2794931[/link]

-tychoc